Topology Checker Qgis 3

To find exceptions. So this tool (you need to activate it under the Plugins Menu) gives you a chance to check your data and FIX IT AUTOMATICALLY. QGIS has powerful on-screen digitizing and editing capabilities that we will explore in this tutorial. 4 Madeira released; Slides of the QGIS user meeting 2018; QGIS 3 Girona released; QGIS 2. Warning! by default this is the first option checked , but due to the fact that the Program Files directory is writing- protected , it will not work. View topology - Azure portal. Mac Installer Packages for macOS El Capitan (10. activate-topology-checker-1024×525. Bayer Seresto Flea and Tick Collar for Large Dog Les (Over 18lbs) 8 Month Protection Collar 724089579607 Open your analysis. I hopped on #qgis earlier and spent a little time with Gary, and I've now tried this on 0. 5d 2d 2dm 3d 3d printing 4326 aboriginal acca accessibility accuracy accuracy assessment actions adapt address addresses address layer addresslayer2 address layer 2 adreça adres adresse adressen aerial aerius affine afvalwaterprognose agd66 agd84 agency for data supply and efficiency aggregate agiv agrc agriculture agsense agt ahn ahp. The Topology storage structure of the coverage was intuitive. If you have QGIS 2. external module), only pseudo-topology (boundaries constructed from polygons) is written. The first long-term release (LTR) of QGIS 3. 4 User Guide (Read and download PDF) English Reviewed by Jamal CHAAOUAN on April 14, 2019 Rating: 5 QGIS 3. The Road graph plugin is the essential tool used for this task, and will be explained with a step-by-step walk-through in this tutorial. We will now create buffers for both the datasets. X installed you will have both QGIS "Desktop" and QGIS "Browser" installed. Best Interactive maps for website Google my map tutorial 02. Maintaining topology in the vector layers is very important; this results in greater data integrity and leads to more accurate analysis results. clean in the Processing window I keep running into the following errors:. There will be a new comprehensive differences article involving ArcGIS Pro vs QGIS 3. currently only 2D topology is supported (also 3D faces but no true 3D topology with kernels) Topology is stored for native GRASS GIS vector format (the default). 9" build - other distributions are not supported. I have some options in fixing my data. To check out the data use for instance QGIS with the DBManager Plugin (select the topology schema and pick TopoViewer? from the menu). ArcGIS Pro had a bit of a head-start as it was released much earlier than QGIS 3. Some topology errors such as dangle (overshoot, undershoot), overlap and gaps are successfully detected using the topology checker plugin with defining rules in the topology rule settings. When it comes to price, there is no comparison !! QGIS is FREE for everyone and ArcGIS is a proprietary software and cost thousands of $$$$. Installation instructions are in the Read Me on the disk image. They are called models because they are not real but are representations of the real world. A GIS topology is a set of rules and behaviors that model how points, lines, and polygons share coincident geometry. GPKG) to know why QGIS 3 made this. QGIS Documentation. Skip navigation (QGIS 3 video is released! Check description) - Duration: 30:18. James Driver 8 месяцев назад. Then you use the Lizmap plugin in QGIS Desktop to help you publish the QGIS project as a web app to your GIS server. Get involved and help us write a better documentation. 4 is unable to locate datasources from a project created with version 2. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. 18 Las Palmas released; ASIT VD. Getting access to OSM data in a GIS format is integrated in QGIS. txt) or read book online for free. Topology Error 1. Check your results. lines that share an endpoint) into a smaller set of longer lines. activate-topology-checker-1024×525. 5 QGIS: remove overlapping areas and fill gaps with the Processing toolbox Faunalia GIS. Select graphics from The Noun Project collection. Class: QgsTopologyPreservingSimplifier¶ class qgis. 6 from python. 20 Reinstall plugin Close Installed Not installed Install from ZIP Settings IQ Search Coordinate Capture Coordtransform - DB Manager evis Geometry Checker Georeferencer GDAL cps Tools Metasearch Catalog Client OfflineEditing plugin Builder 3. GIS Fundamentals: Introduction to GIS Lab 3, Digitizing 1 Lab 3: Digitizing in QGIS What You'll Learn: In this Lab you'll be introduced to basic digitizing techniques using QGIS. Check Visible extent only. A few days ago QGIS version 3. Errors and exceptions. However when attempting to use v. Open the desired shapefile in QGIS. Fixing invalid polygon geometries. Validation. 5) it will replace the previous LTR in the package repositories in February 2019 (see release schedule). The Topology checker opens a function pane, click the configure button at the bottom to open a dialog box. Load the data layer. I have some options in fixing my data. There will be a new comprehensive differences article involving ArcGIS Pro vs QGIS 3. If you have QGIS 2. Selecting line features by topology in QGIS. The long-term repositories currently offer QGIS 3. How do I export data points from topology checker into an attribute table? Updated October 12, 2018 13:22 PM. Warning! by default this is the first option checked , but due to the fact that the Program Files directory is writing- protected , it will not work. The Topology checker plugin ; There is no QGis documentation on how these plugins work when it comes to checking geometries. *) when opening the topology checker panel, then qgis will crash on exit (on my machine a few seconds after the main window has closed). The presentation gives an idea of topology errors in general and steps to clean the polygonal topology errors. This video demonstrates the QGIS Topology Checker pluging. But I just wanted to give some time to both teams of software developers to straighten out with bug fixes and get to certain number of releases. Selecting line features by topology in QGIS. Feature request #7750: Topology Checker - Add "Save to" to the results Feature request #7777 : add blend mode option to qgis composer map item's grid Feature request #7789 : Allow choose font color for grid coordinates in print composer. Topology is the relationship between contiguous or connected features in a GIS. Topology Checker Plugin In this tutorial you can find an introduction on the topology checker plugin which you can use to set up and check some topology rules. QGIS plugins web portal. A 1 minute video showing how to create clean topology - breaking lines at intersection nodes to create new split geometry - useful for network analysis. 18 Las Palmas released; ASIT VD. osm XML file or by direct download from the OpenStreetMap API. 6 Noosa; QGIS 2. Exercise using QGIS. Check Visible extent only. There will be a new comprehensive differences article involving ArcGIS Pro vs QGIS 3. Open topology checker. 52369e+06 and 2. org, it does NOT use any other Python distribution. I would like to check my pipe system topology, and I use the topology checker plugin. 5 Exercise 3: What is the population density (persons per 2km ) in municipalities with borders intersecting the borders of natural preserves? Compare it with the density of other municipalities!. Also create the PostGIS topology using pgAdmin. A polygon in a topology has a centroid, which is a point or block element within the polygon, and contains information about the area it encloses. 6 Noosa; QGIS 2. Open the Topology Panel, by selecting Vector menu, Topology Checker, Topology Checker; The Topology Panel appears in the lower right corner of the QGIS desktop window; Press the Configure button to open the Topology Rule Settings dialog; The top of the box will have 2 or 3 pull down boxes depending on the layer and rule that is chosen. QgsTopologyPreservingSimplifier (tolerance: float) ¶. 1, which I expect it was available in QGIS 3. TUTORIAL - Creating a PostGIS -database for QGIS PART 1 May 25, 2015 April 22, 2017 / Saara-Maija Pakarinen QuantumGIS - or QGIS for short - is an open source GIS -software that works with several database management systems. QgsAbstractGeometrySimplifier. 5) it will replace the previous LTR in the package repositories in February 2019 (see release schedule). 18: Topology checker does not checks gaps and overlaps: 2019-03-09 08:57 PM:. The PostGIS Topology types and functions are used to manage topological objects such as faces, edges and nodes. Getting access to OSM data in a GIS format is integrated in QGIS. rein_konsesjonomr_flate_v with attributtes from table one and a geometry columns casted from the portgis topology column. QGIS is available on Windows, macOS, Linux and Android. Bases: qgis. Topology is necessary for carrying out some types of spatial analysis, such as network analysis. Before we can use this, we should load all the layers that we want to test in QGIS and then configure topology rules:. I did so with snapping to vertices and segments enabled. 55779e+06 5. Gary Sherman began development of Quantum GIS in early 2002, and it became an incubator project of the Open Source Geospatial Foundation in 2007. This rule is used when area features need to have line features that mark the boundaries of the areas. Installation instructions are in the Read Me on the disk image. Once again - if you are familiar with the ArcGIS topology tools this won't feel foreign at all. This recipe shows you how to use the built-in GRASS tools to fix various topology errors in vector layers. The value of cluster tolerance in arc map is limited to 0. All content is licensed under Creative Commons Attribution-ShareAlike 3. These packages use the python. 3, you can define topological rule to check for gaps using the following steps: Go to Vector -> Topology Checker; A panel will be opened; Click on the Configure in the red box above to define a rule. Select Raster >>> Interpolation from the menu items. The points must be inside a polygon. 18 Las Palmas released; ASIT VD. The first long-term release (LTR) of QGIS 3. QGIS and GRASS are connected through a toolbar and I can fairly easily create a new mapset in GRASS and import a shapefile. Select the Custom delimiters which will automatically check mark the Tab option. A very late answer that could be useful to other people : I faced the same issue and I developed a QGIS plugin to solve it. Check Exceptions, and uncheck Errors. To find errors for a particular topology rule. How do we check if our georeferencing is accurate? In this case, load the country boundaries shapefile from a trusted source like the Natural Earth dataset and compare them. Geometry validity: give to the user the choice between Self intersections, Duplicate nodes, Polygon with less than 3 nodes. In table if you already have X and Y field names then it will automatically assigned into appropriate filed, if you have something different then assign your field names in x field and y field. In the Input section of the Interpolation dialogue, use the drop down list to select the appropriate Vector Layer, select the attribute to interpolate. Afterwards you shall be able to select from the list. Compared to the previous release 2. A GIS topology is a set of rules and behaviors that model how points, lines, and polygons share coincident geometry. Changelog for QGIS 3. This book is a collection of simple to advanced techniques that are needed in everyday geospatial work, and shows how to accomplish them with QGIS. These plugins can also be installed directly from the QGIS Plugin Manager within the QGIS application. 3 so you need 7. I've opened the new tab file in MapInfo and it works. So this tool (you need to activate it under the Plugins Menu) gives you a chance to check your data and FIX IT AUTOMATICALLY. The popularity of open source Geographic Information Systems and QGIS in particular has been growing rapidly over the last few years. 5) it will replace the previous LTR in the package repositories in February 2019 (see release schedule). Must not have invalid geometries: Checks whether the geometries are valid. 21 June 2018. The Topology Checker plugin allows us to test a vector layer or its part for different topology errors. QGIS has powerful on-screen digitizing and editing capabilities that we will explore in this tutorial. Check Also. GML data into ESRI Shapefile (and many other formats)? This means that for small areas of data you won't need to purchase expensive translation software. Closing this issue. Bases: qgis. The topology optimization method solves the basic engineering problem of distributing a limited amount of material in a design space. 8 Zanzibar and in 3. 4 just released. ) Styling can be defined in QGIS using its symbology tools and will be converted to SLD when publishing a layer. ArcGIS - Geodatabase Topology Monde Geospatial Geospatial videos, news, articles and events relating to GIS, cartography, Remote Sensing, GPS, Surveying, Geomatics and geospatial technologies Home. 5 QGIS: remove overlapping areas and fill gaps with the Processing toolbox Faunalia GIS. In the Input section of the Interpolation dialogue, use the drop down list to select the appropriate Vector Layer, select the attribute to interpolate. Validate will only be run against the dirty areas in your topology. Guild Of Light - Tranquility Music 1,826,822 views. Topology is the relationship between contiguous or connected features in a GIS. 5) it will replace the previous LTR in the package repositories in February 2019 (see release schedule). Report back on the 3rd QGIS Conference in Nødebo, Denmark Posted on August 15, 2017 August 16, 2017 by Tim Sutton Posted in QGIS Funding , QGIS User Conference We just wrapped up the 3rd QGIS User Conference at the University of Copenhagen's "Skovskolen" Forestry and Landscape College, just outside of Copenhagen. 5d 2d 2dm 3d 3d printing 4326 aboriginal acca accessibility accuracy accuracy assessment actions adapt address addresses address layer addresslayer2 address layer 2 adreça adres adresse adressen aerial aerius affine afvalwaterprognose agd66 agd84 agency for data supply and efficiency aggregate agiv agrc agriculture agsense agt ahn ahp. Check out our QGIS video tutorials where we go through this tool and others. 4 is the first LTR (long term release) of QGIS version 3. One of the area’s that QGIS is constantly improving is the ‘Processing framework’, Formerly known as the sextante framework and written in java, it is rewritten in Python by one of the original authors Victor Olaya and made part of QGIS since about QGIS 2. I have a shapefile with multiple polygons. Using QGIS Core Plugins Topology Checker: Find topological errors in vector layers: Topology Checker Plugin: Zonal Statistics: Calculate raster statistics for. The Road graph plugin is the essential tool used for this task, and will be explained with a step-by-step walk-through in this tutorial. В редакторе для OSM iD или в Документах Google есть свои собственные контекстные меню, а в Firefox, при нажатии правой кнопки мыши, родное контекстное меню браузера полностью или частично закрывает меню приложения. I'm using a newish version 2. These plugins can also be installed directly from the QGIS Plugin Manager within the QGIS application. However, QGIS uses the Topology Checker Plugin to study the topology but it is not affected by cluster tolerance. after creation of search service application in search topology i found below message Search Application Topology Unable to retrieve topology component health states. Polygon topology is an extension of network topology and focuses on area-based relationships. The topology can be correct with those small slivers that you don't want. This is a great assurance of the project’s vitality. 2 brings a massive list of new changes - the highlights of which we will try to cover here. I am working with topology checker in Qgis 2. Topology is necessary for carrying out some types of spatial analysis, such as network analysis. Before you begin make sure the user has saved and unzipped the gups. Although you can't create or edit geodatabase topologies with ArcView (only ArcEditor and ArcInfo), you can create and edit map topologies in ArcView. In GIS, there are two main data models: vector and raster. Check for update suggests wrong option Cannot load GPX file automatically after creating it QGIS 3. Master map shapefile and QGIS 2. Например, я использовал его для поиска всех перекрывающихся полигонов. To find errors for a particular topology rule. This check can take some time, but subsequent checks are performed only on the areas that have been edited. 8 Zanzibar and in 3. Planar topology can be enforced on shapefiles with the assistance of some Avenue scripts. I'm using a newish version 2. GIS Fundamentals: Introduction to GIS Lab 3, Digitizing 1 Lab 3: Digitizing in QGIS What You'll Learn: In this Lab you'll be introduced to basic digitizing techniques using QGIS. These are alternate, semi-official QGIS packages. In the next few steps we will set the rules that will identify the geometry errors for our offending layer. 4, covering its processing engine update, Python 3 de-facto coding environment, and the GeoPackage format. Still there are a few topological errors which occur such as sliver polygons. 21 version – as that is the version of my. This uses Python 3. GIS Coordinated. 6 Noosa I can identify digitizing errors such as gaps and overlaps. (There is a limit to the size of map you can export this way. after creation of search service application in search topology i found below message Search Application Topology Unable to retrieve topology component health states. Leave a Reply Cancel reply. This is the Elevation attribute if using a check file. You can validate a topology from the Topology toolbar during editing. Giovanni Manghi wrote: Nyall Dawson wrote: Actually this was an intentional change in 3. rein_konsesjonomr_flate_v with attributtes from table one and a geometry columns casted from the portgis topology column. For this tutorial, I assume you already have QGIS Desktop installed. These are alternate, semi-official QGIS packages. The map shows the extra lines in red inside the external boundary (in this case the international boundary), these represent the topological errors. 23rd May 2017 Ian Wilson. QGIS - Fill gaps and slivers between polygons - v. QGIS Topology Checker. Running a set of integrity checks to identify any violations of the rules that have been defined for the topology; Usage. Well – they are all three doing one thing – making better data. If no edits or updates have been made since the previous validate, there is nothing to check. topology checker>toplogy checker… This will open and dock a new "Topology Checker" window in the map view. Open the Topology Panel, by selecting Vector menu, Topology Checker, Topology Checker; The Topology Panel appears in the lower right corner of the QGIS desktop window; Press the Configure button to open the Topology Rule Settings dialog; The top of the box will have 2 or 3 pull down boxes depending on the layer and rule that is chosen. Get involved and help us write a better documentation. The initial validation of the topology checks all the features in the participating feature classes in a topology. Having vector data without topology errors is important for further analysis, as these errors may lead to incorrect results. However when attempting to use v. qgs map (which you should have created and saved during the previous module). This uses Python 3. vector>topology checker>toplogy checker… This will open and dock a new “Topology Checker” window in the map view. Before you upgrade or migrate your environment to vSphere 6. 12 that has been introduced – the Check Geometries Plugin. [Editor’s note: upon first encountering QGIS it is not uncommon for folks to wonder where the “Q” came from in QGIS. A map topology is a simple topology that you can impose upon simple features on a map during an edit session. The problem is the following: when I make a rule on a line (End points must be covered by), I can choose only one. One of the area’s that QGIS is constantly improving is the ‘Processing framework’, Formerly known as the sextante framework and written in java, it is rewritten in Python by one of the original authors Victor Olaya and made part of QGIS since about QGIS 2. The first long-term release (LTR) of QGIS 3. The QGIS OpenStreetMap Plugin is a plugin for the desktop GIS application QGIS. Fixing invalid polygon geometries. Also create the PostGIS topology using pgAdmin. The georeferencing is now complete. The PostGIS Topology types and functions are used to manage topological objects such as faces, edges and nodes. In table if you already have X and Y field names then it will automatically assigned into appropriate filed, if you have something different then assign your field names in x field and y field. Changelog for QGIS 3. Bug report #14017: Configuring the Topology checker tool makes QGIS master crash Bug report #14021 : changing a value in the advanced settings editor makes qgis crash Bug report #14037 : frequent crash when editing data in relation forms (standard relation form-widget, generated by qgis). Rate this post. The software and hardware described in this document are in most cases registered trademarks and are therefore subject to the legal. Now you will create a geodatabase topology to help you find errors in the lot lines data. You'll become a master in data creation and editing, and creating great maps. Log into the Azure portal with an account that has the necessary permissions. Topology describes the relationships between points, lines and polygons that represent the features of a geographic region. QGIS Topology Checker. You can validate a topology in the Catalog window or ArcCatalog by right-clicking the topology in the tree view and clicking Validate. " function was not working well. 6, the "macosx10. 2016 was again very productive year for the QGIS community, with lots of improvements and new features landing on QGIS source code, not to speak of all the work already in place for QGIS 3. 4 User Guide (Read and download PDF) English Download QGIS 3. 0’s “Locator bar” (that “type to locate” bar which sits in the bottom-left corner). ArcGIS Pro had a bit of a head-start as it was released much earlier than QGIS 3. Othеr differences. So this tool (you need to activate it under the Plugins Menu) gives you a chance to check your data and FIX IT AUTOMATICALLY. This is the Elevation attribute if using a check file. Find dangles using QGIS QGIS Desktop 2 has a easy to use plug-in - Topology Checker , that can be used to identify dangles in linear features. I can set snapping and minimum areas to import. Steps to install GUPS Manually. It's now a documented process (that will get posted up here shortly). qgis-manual-3. QGIS creates pre-rendered tiles at different resolutions and these are presented to you instead of the full raster. 12 that has been introduced – the Check Geometries Plugin. QGIS is a user-friendly, cross-platform desktop geographic information system used to make maps and analyze spatial data. Check Exceptions, and uncheck Errors. QGIS ¶ The quintessential user friendly, cross platform (win/lin/mac) open source GIS desktop application and a server. This post aims to illustrate one of the most common issues and presents an approach that can help with these errors. This is a great assurance of the project’s vitality. After five consolidation point releases (3. Request PDF on ResearchGate | On Jan 1, 2019, Anita Kukulska and others published METHODOLOGY OF EVALUATION AND CORRECTION OF GEOMETRIC DATA TOPOLOGY IN QGIS SOFTWARE. Topology rules allow you to define those relationships between features in a single feature class or subtype or between two feature classes or subtypes. The value of cluster tolerance in arc map is limited to 0. 6: 2019-04-02 01:49 PM: "Topology Checker" and multipart (shapefiles) QGIS 3. The physical topology of a network is the layout of nodes and physical connections, including wires (Ethernet, DSL), fiber optics, and microwave. QGIS’ ассерtаnсе іѕ grоwіng but is mostly рорulаr in асаdеmіс сіrсlеѕ аnd іn arenas whеrе open source ѕоftwаrе іѕ thе nоrm. Installation instructions are in the Read Me on the disk image. 0 'A Coruña' and was released on 25. This recipe … - Selection from QGIS: Becoming a GIS Power User [Book]. 10 or newer you can skip directly to step 4 and disregard most of step 6: We had an ArcGIS LiDAR processing toolbox since April 2012 and now we have one for QGIS as well. Check the Full box -City cpt package Choose the directory to install the package. The value of cluster tolerance in arc map is limited to 0. Topology errors are violations of the rules that you can. At one time. Clean Topology in QGIS 3. Violations of topology rules are initially stored as errors in the topology. This video demonstrates the QGIS Topology Checker pluging. 33, QGIS Server LTR 2. After five consolidation point releases (3. There is a collection of plugins ready to be used, available to download. The special feature of the QNEAT3 implementation is that it uses the concept of off-network travel which is made possible by using the Qneat3AnalysisPoint class. Topology checker red markers. Guild Of Light - Tranquility Music 1,826,822 views. Add the road data to QGIS. The first long-term release (LTR) of QGIS 3. Every area forms a polygon; and each polygon in a topology consists of a set of links. During discussions, it exposed me to the limitations of auto-cleaning data topology offered by GRASS GIS. The Validate Topology geoprocessing tool can be used to validate a topology as part of an automated workflow. I'm acquainted with topology editing in ArcMap using geodatabases. Cluster tolerance doesnt effect the topological errors. Quantum works on Windows and Unix. Here, you will be introduced to the topology checker plugin. To find exceptions. But I just wanted to give some time to both teams of software developers to straighten out with bug fixes and get to certain number of releases. QGIS (previously also known as Quantum GIS) is a free (GNU GPL v2) and open source GIS application enabling the user to visualize, manage, edit, analyse data, and compose printable maps. Check out our QGIS video tutorials where we go through this tool and others. Rudimentary tools for checking topology in QGIS. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. QGIS macOS asennuspaketti versio 3. The vector topology model stipulates that:. 3- Introduction to Python Python as a language Python in QGIS Python Console Syntax Pitfalls Exercise 3 – Introduction to python in QGIS 7 – Vector processing in QGIS Processing framework Bath processing Geoprocessing tools Exercise 7 – Spatial analysis case study 8 – Raster processing in QGIS Raster menu Raster calculator Interpolation. " function was not working well. Its physical topological files were readily understood by ArcInfo users. Control Sentinel Hub from within QGIS. Open the Topology Panel, by selecting Vector menu, Topology Checker, Topology Checker; The Topology Panel appears in the lower right corner of the QGIS desktop window; Press the Configure button to open the Topology Rule Settings dialog; The top of the box will have 2 or 3 pull down boxes depending on the layer and rule that is chosen. The topology can be correct with those small slivers that you don't want. Luckily, the process of fixing topology is relatively straightforward, and I followed the instructions in these PowerPoint slides to learn how to fix topology errors and run network analysis tools in QGIS. The initial validation of the topology checks all the features in the participating feature classes in a topology. Select graphics from The Noun Project collection. I would like to access external qgis plugins through a python script. Option to save/load topology rules as xml. Manage your databases within Qgis Category Data base Author Giuseppe Sucameli Installed version O. 4 just released. With the Topology Checker plugin, you can look over your vector files and check the topology with several topology rules. "Spatial databases are enhanced for storage and fast retrieval of data that defines a geometric space. In this video, you will learn how to manipulate vector layers to correct their geometry. QGIS and GRASS are connected through a toolbar and I can fairly easily create a new mapset in GRASS and import a shapefile. Control Sentinel Hub from within QGIS. I would like to check my pipe system topology, and I use the topology checker plugin. topology checker>toplogy checker… This will open and dock a new "Topology Checker" window in the map view. For example, in a street centerline feature class that is part of a topology, an orphan is a street that is not connected to any other streets. We recommend all organizations that have not yet had the opportunity to test the release candidate versions (Nightly builds) to test their projects with the new version 3. About creating a map topology. Using the Topology Checker Plugin in QGIS 3. I'm acquainted with topology editing in ArcMap using geodatabases. The result will still have slivers after correct topology. Having vector data without topology errors is important for further analysis, as these errors may lead to incorrect results. Errors and exceptions. Open the Topology Panel, by selecting Vector menu, Topology Checker, Topology Checker; The Topology Panel appears in the lower right corner of the QGIS desktop window; Press the Configure button to open the Topology Rule Settings dialog; The top of the box will have 2 or 3 pull down boxes depending on the layer and rule that is chosen. Pre-upload hooks can be set up, to process all layers before they are published (for instance, running some topology check or a geometry simplification routine. Why? Topology. As the previous versions of QGIS, the software is really intended to make more spatiall analysis and management with less effort, however this version has new tricks and a new order to locate tools. 55779e+06 5. I have both QGIS Desktop LTR 2. Sandro Santilli's presentation at PostGIS Day Paris 2011 conference gives a good synopsis of PostGIS Topology and where it is headed Topology with PostGIS 2. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: