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Questions tagged [qgis]

QGIS is an open source program used to process and visualize geospatial data. It is available for most desktop and mobile operating systems.

QGIS (formerly Quantum GIS) is a user-friendly, cross-platform Geographic Information System (GIS) application with support for Linux, Unix, MacOS X and Windows. News updates are available from the QGIS blog.

QGIS supports numerous vector, raster, and database formats and provides numerous features for exploring, creating, analyzing, converting and exporting geospatial data. The core functions can also be extended through external plugins written in .

QGIS is an official project of the Open Source Geospatial Foundation (OSGeo) and is licensed under the GNU General Public License.

The gis.stackexchange.com site covers QGIS use cases in detail.

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QGIS: Return hexagon tiles which intersect with shapefile

I am trying to compare two shapefiles in QGIS and want to have a result in which only one of the two shapefiles shows the intersecting shapes. An example what I am trying to achieve can be found here:…
Nils de Bruin
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QGIS - different CRS for different layers

I am using QGIS 2.10.1 with some Chicago data (from https://data.cityofchicago.org/browse?tags=gis) and the Google Streets plugin. My issue is with the CRS's for the Chicago layers and the Google Streets layer. Google Streets is in WGS 84/Pseudo…
moman822
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Convert a recursive function into Non recursive in Python

How could I convert and optimize this recursive function into an iterative one. I'm trying to program a function that accumulates the flow using a map of directions, however, for direction maps of very large size the function just crashes. I am…
Rhernan4
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QGIS slope calculator not producing expected result

I am trying to visualize slope for an elevation raster using QGIS terain analysis tool. The results are no what I would expect. Elevation raster is from NASA's SRTM program. I picked a relatively mountainous region to run a test N39W121. elevation…
user3750486
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Building QGIS source code on Windows 7 - Not working

As mentioned here I've tried to build the QGIS on Windows 7. There are two methods one using Visual Studio Express Edition installer and the second one using MinGW. I've found both of them broken and don't know what to do next In building using…
user5858
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Incomplete display of style in geoserver generated in QGIS

SLD generated in QGIS 2.10 PISA is as follows-
Payal Pandey
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Error in CMAKE while building QGIS 2.8 (32 bit) from source in Windows 8 (64 bit) using VS 2008

I am following this tutorial to build QGIS (32 bit) from source on a Windows 8 (64 bit) machine using Visual Studio 2008 (Microsoft Visual C++ 2008 Express Edition). CMAKE gives some warnings, but finally configures & generates. But then when I do…
PKG
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pgrouting not find routes

Having in hand the shape of the road and rural roads in the target region, followed the workshop documentation is available in pgrouting the site, I created the required fields, ran the pgr_createTopology, and other verification queries…
Franklin Januário
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ConvexHull and scipy throws an error when importing in qgis

When I am trying to import ConvexHull from scipy I am getting an error. from scipy.spatial import ConvexHull **Traceback (most recent call last): File "", line 1, in ImportError: cannot import name ConvexHull** Here what I am…
user4602735
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How to capture UDP packets with Python

Facts & context elements: I need to capture data (latitude,longitude) coming out of a GPS device rework them and make them suitable for another application (QGIS). To this end I've tried to perform (What I thought at first would be a simple one) a…
Obi Wan
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QGIS display points from query in Postgis

I am creating a point geometries in a view from an x,y column in a postgresql/postgis table. I do: create or replace view my_points as select ST_SetSRID(ST_MakePoint(geo.x,geo.y), 2154) as geom, pg_typeof(geom) as type from table1 …
Blue
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How to add a filed in multiple layer in QGIS using python

I have 10 vector layers in QGIS. I want to add a field 'City', character varying in each of the layers using python. I have tried to add in a single layer but it is not working. layer = iface.activeLayer() layer.addAttribute([QgsField('City',…
user19120
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How to display multiple filenames with checkboxes inside the listview using pyqt

I am trying to get files from filedialog and display the name of the file names inside the listview. And also checkboxes should also be created before the filenames inside the listview based on the number of files added. Below is my code that…
harinish
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QGIS connect to database Filemaker

I want to connect Filemaker DB with QGIS. Now I have already created some basic tables in QGIS. Say I want to display detail information for each county in the United States. Now I got the countyID both in QGIS and Filemaker tables, I want to use…
Ye Xu
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Create shapefile using textfile in QGIS

I have a shapefile in QGIS which has polygons in it . There are several other attributes for each feature . I want to add another attribute to each feature . The value for this attribute is available to me in a text file . How do i add this column…
jps
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