QGIS is a user-friendly, cross-platform GIS application licensed under the GNU General Public License.

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23 views

How to allow the user to place a point as input for a geoprocessing model?

Is there an analogue to Esri's "Feature Set" in QGIS modeller. I am interested in creating a model that allows the user to place a point feature on a map as an input variable for a geoprocessing ...
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29 views

Why does repeatedly running the Difference Tool in QGIS stop working?

I'm having problems using the Difference tool in QGIS. When I progressively remove areas from a shapefile (a simple buffer) using the Difference tool, it seems to work fine until I get to the 5th to ...
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1answer
22 views

How to reference a return value from openProject macro?

It is very good to have available functions on startup.py, I created one to get the qgs project base name and referencing it as a Python expression on the composer thanks to all the information found ...
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1answer
42 views

How to start writing a QGIS Plugin?

I'm taking my first steps in writing a plugin for QGIS by following this tutorial: http://www.qgisworkshop.org/html/workshop/plugins_tutorial.html There is not even any functionality in this code, ...
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1answer
40 views

QGIS distance matrix in meter instead of decimal degrees

I'd be thankful for your help. i created a point layers of store locations and customers in Florida by given coordinates (WGS 84 EPSG: 4326). Now i need a distance matrix between stores and customers ...
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1answer
42 views

QGIS WFS-T not updating data

I have asked for help on this topic a few times, but i'll go one more time; with a bit more info. I am trying to edit a WFS from geoserver (using PostGIS data) within QGIS. This is the request as ...
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0answers
43 views

How to import a .sid Raster File in QGIS 2.6.0 On Linux Mint 17

I need some help importing MrSID Raster files in QGIS. I am running 2.6.0 on Linux Mint 17. After an internet search I have found a couple of resources that are perhaps outdated. The most promising is ...
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0answers
36 views

Is there an easier way to refresh a joined CSV?

I'm working with data that gets updated sporadically. Essentially, I have a CSV which defines which postal codes belong to certain sales reps, and these postal codes might shift around. I made ...
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1answer
42 views

QGIS polygon outline color lighter

How can I make it so that the gradient classifer (look closely, there are bits of red in some places) is more pronouced? Or that the outlines of the zip codes are less pronounced?
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0answers
23 views

Creating an automatic connection to Microsoft SQL database instance in QGIS

I have connected to an MS SQL database in QGIS using the Add MS SQL table(s) tool. However I have a lot of feature in my database and so it is inconvenient to reconnect to the database every time I ...
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1answer
25 views

Saving text labels out of qgis

I have imported an OS mastermap text shapefile into qgis 2.2.0 (desktop). It only shows as points information, no text. I have edited labels so that they show (e.g. road names). The problem that I ...
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1answer
128 views

How to remove Commas from field values in multiple files?

I'm working in QGIS, presenting data in ArcMap, and Arc is having trouble with the attribute tables. I have a "species" column which lists the species found in that area and have added commas "," in ...
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0answers
25 views

QGIS field calculator expression: selecting min/max values within field groups

I am new to using QGIS (previously used Arc) and trying to get my head round the expressions and Python. I have series of polylines representing routes and require the linear distance from the ...
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1answer
42 views

How to calculate distances in QGIS field calculator?

So I'm using qgis 2.6.0 and I have a csv (converted into a .shp) with two geometry columns, I want to create a new column with the distance between the two geometry: shot.lat shot.lon haul.lat ...
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0answers
32 views

Versioning In QGIS

Are we planning to have in QGIS implementation 1 Versioning like ESRI. How that can implemented? There is a general need for the the implementation where QGIS is used for planning and planned design ...
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1answer
56 views

How to export lines from ArcGIS to be used in QGIS

After a big bunch of bureaucracy we have been giving green light to request government geodata. The requested data includes mostly seperate landplots, roads and rivers. We originally were told we'd ...
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1answer
79 views

Generate territory polygon from sets of points

I'm looking for a simple way to generate contiguous "territories" from sets of points. Say, points A, B and C are in territory 1, and D, E and F are in territory 2, then generate polygons that lie ...
2
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1answer
42 views

How do I select a point imported from a GPX file?

I imported several GPX files and added a raster basemap for reference. The GPX files contains tracks so the points are sequentially numbered. I'd like to identify one of the points so I edit the GPX ...
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0answers
19 views

How to find QGIS or QT or Python object definitions

I am attempting a simple plugin, on QGIS 2.6, using the available QT Designer installed I have successfully loaded a plugin, and can display a dialog box with widgets, within, and now attacking ...
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0answers
43 views

Permission denied when clipping raster

Trying to use raster extraction clipper to prepare a selected area of the map for generating contours - keep getting the error message: ERROR 1: TIFFOpen:everest_gmted30.tif: Permission denied ...
2
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1answer
56 views

Is it possible to render a large number of shapefiles to a pdf document using Python?

I'm extremely new to GIS, and recently made a map by loading a bunch of shapefiles into QGIS using a python script. However, it took 15 mins to scroll in or out on the image, and the pdf export ...
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0answers
42 views

QGIS vector edition corrupts SpatiaLite attribute table

I have a problem with edit SpatiaLite Layer on QGIS. When I make a this set of editions: cut line, delete a part, insert a new line and save it, the attribute table is corrupted. I was thought that ...
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0answers
18 views

QGIS Processing Toolbox: otb provider XML

Good day, I am trying to integrate an OTB application into the processing toolbox. MANUALLY created a XML file for it but get : Could not open OTB algorithm: ...
2
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1answer
60 views

Fuzzy maps with QGIS/GRASSGIS

How to do fuzzy maps (FUZZY module in IDRISI) with QGIS/GRASSGIS?
4
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1answer
70 views

Unable to see map in QGIS?

I am new to QGIS but used to ArcGIS. I am working my way through the tutorial and have downloaded a map from earth explorer - following all the instructions. The map is in the left hand panel and ...
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0answers
83 views

Is there any reason not to upgrade to Windows 8.1?

I have the option to upgrade to 8.1, but before I do I want to see if anyone has had any compatibility issues. I mainly run ESRI, but occasionally use QGIS, and other open source products. Has anyone ...
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0answers
40 views

How do I show the file path on a map?

Can anyone tell me how to show the file path of a map when I'm composing my final map figure. Kinda of like in excel in the headers and footers options where you can show the file path of the excel ...
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0answers
49 views

QGIS Crashes with OpenLayers plugin

I've just updated to QGIS Brighton on Ubuntu 14.04, and I've noticed that when I open Openlayers plugin, in order to load google layers, the whole program suddenly crashes. The only log I see, when ...
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0answers
53 views

Calculate area in square meters from degrees?

I have a polygon shape file in geographic coordinate system, i would like to calculate area in square meters in QGIS using python. Is there any formula or equation to do this? Thanks
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0answers
99 views

ESRI Personal Geodatabases in QGIS 2.6

I am having an issue loading any ESRI personal geodatabase in QGIS 2.6. I have a number of files that worked in QGIS 2.4 and having done the upgrade I can't open them in 2.6. I have tried this with ...
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0answers
14 views

Add ids to the merged features using python programming

I have written the python code that merge the features based on the area.But after merging the features it is not assigning ids to the merged feature.Can anyone tell me how to assign ids to the merged ...
4
votes
3answers
63 views

QGIS Composer thematic map : one (png, pdf, etc.) map per feature type

I've got a shapefile that contains thousands of features that can be group by categories. These features are sometime located in the same place so they overlap. An example of the content of my ...
2
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1answer
45 views

Convert Layer to Shapefile without losing Feature definitions

I have created a worldmap with custom defined Features, representing State/Zip-Code sales areas. I want to convert them into a Shapefile, so I can convert the Shapefile into a polygon definition file ...
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1answer
39 views

How do I measure the area difference between polygons in different shp files?

I have couple if shp files with 1000 polygons scattered in them (around 1k in each file) , each shp file represents a time frame (3 months period) and I want to show the a report with a progress of ...
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1answer
27 views

With QGIS Plugin Builder, receiving “ImportError: cannot import name”

While doing a first-time attempt to craft a simple plugin, I ran into the above error. I am using QGIS 2.6.0 for windows, the QT Designer that comes with that package, and the plugin builder plugin ...
2
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1answer
46 views

How to Export to DXF and retain elevations of contours using QGIS?

I have shape files for a whole county, and have created a base map in Qgis. What I do for my projects is zoom into the area of interest then export to dxf. The same procedure was used when I used ...
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0answers
21 views

How to fill empty pixel from DEM using QGIS?

Is it possible to fill empty pixel from DEM (hgt file)?) in QGIS ? When I load it, and zoom to a big scale, some pixel without any value appear. ( I have found a way using another software 3DEM on ...
4
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2answers
100 views

How to draw points around a circle in QGIS?

I've got a square origin-destination matrix with 23 elements, I would like to draw each one of these elements as a point around a circle, to achieve a result like the following: Can you suggest me a ...
3
votes
1answer
31 views

QGIS using the heatmapplugin from the console

I have to make a lot of heatmaps from csv's. Therefore I'm making a python script to run in the console. So far I can load csv's and save them as shapefiles. To get to the heatmapplugin I'm using the ...
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0answers
37 views

Regenerate contour lost parts

I have some countour datasets where some parts were cut by labels, like this: Can these parts be regenerated? What I've tried is to create a straigth line between the dangling ends, but there are ...
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0answers
54 views

PyQGIS cookbook seems out of date

I am trying to follow the http://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/ but it seems to be out of date, for example many of the raster methods no longer work as indicated or even ...
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0answers
25 views

DB manager not updating

I'm trying to learn how to use spatialite databases, so have made a few experimental ones. When I delete them, however, they still show up in QGIS's DB Manager. If I try to open them it comes up with ...
1
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1answer
30 views

Qgis Python console print statements not working

I have a small problem with the Python console in Qgis. I am working through some introductory tutorials on Python scripting for Qgis. I have a script that loads layers, then queries the canvas for ...
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1answer
30 views

Easiest way to add layers to QGIS [duplicate]

I have OSM data that I've loaded into a Spatialite database now what's the easiest way to get it to look like OSM? I shouldn't have to add and style each layer individually but I can't figure out what ...
6
votes
3answers
107 views

QGIS choose contour line labels

Is it possible to select only one contour line for labelling ? I have numerous labels for each line and I'll prefer to label only the main ones , such as "1000 m" and "1500 m" Thanks a lot
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0answers
27 views

WMTS Geoserver 2.5.2 - QuantumGIS

I am trying to configure a WMTS using the version 2.5.2 of Geoserver. It seems to be quite straight forward. The problem comes when I try to connect to the WMTS using QuantumGIS 2.6.0. I have access ...
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0answers
22 views

How to actually add the path to a file conatining a photo on a QT form using QGis/Postgis/Postgress

Simple newbie question as I have just designed my first QT form, after a frustrating afternoon search unsucessfully for the answer, help please. I have a spatial table in postgress, loaded into QGis, ...
2
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1answer
42 views

QGIS 2.6 - Point Sampling Tool plugin producing empty shapefile

I use a DEM file (*.tif) and a points layer. My need is basic : getting the Z value for each point by extracting them from the DEM. Both layers correctly opened with QGIS 2.6. The DEM returns a Z ...
2
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2answers
45 views

QGIS failing to complete clip or intersect

I have been trying to perform a intersect (then tried using clip) on a rather large dataset on QGIS. I have been able to complete similar geoprocessing using slightly smaller datasets and the layer. ...
3
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1answer
111 views

Export Model to python script in QGIS 2.6?

I just wanted to ask where the export model to python script option has gone in QGIS 2.6.0? Thanks