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

learn more… | top users | synonyms

1
vote
2answers
91 views

Coordinate Reference System issues between SHP and Raster file

I am having an issue with the CRS of a given Aster DEM. I have downloaded a Aster DEM from www.oziexplorer3.com which comes with the EPSG:4326 - WGS 84 as the CRS. This is a DEM from Gabon, and all ...
3
votes
1answer
78 views

How do I select all outermost features

Is there anyway in QGIS that I can select all the outermost features on a map? On an island that would be all that have a coastline. edit: This is what I'm trying to select:
0
votes
0answers
24 views

How to build an optimization model? [duplicate]

I want to make a model using QGIS. Is it possible? Then how can I develop a model. can anyone help me?
0
votes
0answers
56 views

qgis: module crashed or killed

using Grass 6.4.3. via Qgis 2.2.0 Valmiera (standard installation package): Why would Grass modules suddenly produce a "module cashed or killed" error. specifically in relation to r.surf.idw2 and ...
2
votes
1answer
613 views

How to create atlas along line/route in QGIS

I'd like to create a mapbook along a given route that is designated by a single linear feature. Is it possible to have QGIS (2.2) automaptically compose a series of pdfs that over lap by a given ...
0
votes
0answers
47 views

QGIS - Obtain elevation profile [duplicate]

I wish to obtain a bathymetry profile along the selected path (Google Earth calls this feature "elevation profile". Can QGIS 2.2 provide this? I created a layer using the WMS service to load the ...
1
vote
1answer
105 views

QGIS - View bathymetry info in the status bar

PolyGo suggested that I split my earlier twofold question into separate questions. So: I am new to QGIS or any GIS software so please forgive me if the answer is obvious to you. I wish to view the ...
0
votes
1answer
136 views

Modifying Fields in QGIS

I'm pretty new to Quantum GIS, and I was looking to add zeros to a field I was having some trouble with. I learned through browsing a few posts here that existing fields can be modified by defining ...
0
votes
0answers
73 views

Enlarge region/features in shape file

I'm completely new to QGIS. I have a shape file over the counties in Denmark (see here for what the shape file looks like). The counties around Copenhagen are rather small and I'd like to add an ...
1
vote
1answer
99 views

Unable to install QGIS 2.2 successfully?

I'm having problem in installing QGIS 2.2. (64 Bit). After downloading & installing, when I click the OSGeo4WShell, I get a message: C:\***.exe not a valid win32 application and ends with: ...
0
votes
0answers
175 views

Save map canvas as image with drawings

Is there any way to save the map canvas as an image, with the drawings on map? I draw a line on map, and saved it as image, but only the map saved(without line). I used the following code.. ...
0
votes
0answers
19 views

Created polygon appears to move when zooming in (qgis)? [duplicate]

I am using QGIS 2.20 on a Windows 8.1 64-bit laptop. I have a shapefile that includes a polygon that I created from digitizing a Google Satellite image from OpenLayers Plugin. Here is my problem: ...
1
vote
3answers
181 views

How to measure areas using an official CRS which is not available in QGIS?

I am very new to QGIS and doing a project on Glacial Lake Outburst & Flooding (GLOF). I am trying to find the area of a lake using images from Google Earth 7.0.3.8542. I am using the WGS84 CRS ...
6
votes
1answer
5k views

Where is the Merge selected features button in QGIS 2.2?

Ever since I updated to QGIS 2.2 I've been a bit lost with the new menu layout (I was running on Wroclaw until then). I can't seem to find the "Merge selected features" button. I need to merge ...
2
votes
3answers
108 views

Can QGIS merge CSV files with different colums? [closed]

I am trying to merge a month's worth of daily CSV files without using ArcGIS. Each file has ~25,000 entries so this is a high data load project. Sample data can be found here. Note that we are using ...
1
vote
0answers
17 views

QGIS merge selected features tool malfunctions due to geometrical errors [duplicate]

The issue occurs using the 'Merge Selected Features' tool when there are geometrical errors in the features (not all are picked up by the 'check geometrical validity' tool). In 2.2 Valmeria, the ...
1
vote
0answers
38 views

Reclassify based in neighbour polygons

I would like to do a simple operation in QGIS and I am not sure about which is the best option. I have a polygon shapefile and each one has one class attached. I want to reclassify one of them based ...
0
votes
1answer
200 views

Problem when converting Shapefile to KML files in QGIS

I select Layer CRS as WGS 84 (EPSG:4326) When I open the kml layer in Google earth it is wrong. In Google earth, appears some segments every where on the globe. Can anyone explain to me what is the ...
0
votes
0answers
44 views

Couldn't load PyQGIS in QGIS 2.2 on Ubuntu 14.04 [duplicate]

This issue appears to be occurring with some frequency to folks in some shape or form. I upgraded from ubuntu 12.04 to 14.04, with loss of python functionality. My QGIS version is 2.2 from the ...
0
votes
1answer
45 views

QGIS API documentation in French?

I am looking for a document which explains what the API of QGIS is, with examples of this API but in French.
2
votes
2answers
159 views

How to get the Measure Line in Yards (not Feet)

I'm using Qgis Dufour 2.0.1 and the Openlayers Plugin for images. I'm working on a golf course project where everyone thinks in yards. I've tried different CRS (now working the State Plane Missouri ...
1
vote
0answers
208 views

Problems installing libgdal-ecw package

I have problems to visualize ecw files for qgis 2.3.0 using ubuntu 12.04 LTS. From terminal, following the instructions for qgis 1.8 found at ECW for QGIS 1.8 in Ubuntu 12.04, because launching the ...
0
votes
0answers
108 views

QGIS Small multiples / animate across columns

I want to turn each column of a shapefile into choropleth. I have over 100 columns, so rather than manually classifying each column and exporting an image, I was wondering if there is a way to ...
4
votes
3answers
317 views

How to compute the outline of multiple tracks?

I have multiple gps tracks with depth data gathered from the lake. The tracks are overlapping/intersecting. I want to get an outline polygon. I have a multi-line shp. I've tried to diffuse it in qgis ...
1
vote
0answers
125 views

GeoTIFF Mosaic/Crop/Translate in QGIS?

I routinely have to mosaic multiple GeoTIFFs together, extract a rectangular area, and save that area as a JPG with a world file. Typically I've been using commercial software for that (Geographic ...
2
votes
1answer
59 views

Resolve polygon parent relationship in QGIS

I have a layer in which, following geometry processing, the polygon of a zone that is a full enclave to another seems to have become its child object, which I think will cause problems down the line. ...
1
vote
2answers
229 views

Any difference between EPSG:3003 and EPSG:102091?

I am working on QGIS 2.2.0. The PRS I am working on is Monte Mario / Italy zone 1 (EPSG:3003), with the following parameters: PROJCS["Monte Mario / Italy zone 1", GEOGCS["Monte Mario", ...
1
vote
1answer
464 views

How to get QGIS layers style in a single file

I have layers on my QGIS project. Rivers Water pipes Gas pipes ..... I set the color, width, size of these layers. All layers are different style. I want to use these styles in geoserver. I have ...
0
votes
2answers
109 views

Is there a way to run spatial join within tolerance?

I have some data that should be spatially joined, but from small precision differences (less than 1 in) they aren't joined. I've found no way to add tolerance to qgis spatial join operation. Is there ...
0
votes
0answers
175 views

Is it possible to get WMS feature info for the WMS layer in the QGIS web client?

When I load a wms layer in qgis, it's possible to get feature information. When I open the web-gis-client on my server, it's possible to get feature information for all layers but not the wms layer. ...
0
votes
1answer
43 views

QGIS GRASS vector simplification creates duplicate data rows

When simplifying polygons in QGIS (2.2.0) with the GRASS v.generalize tool the resulting layer duplicates some data rows many times. A shapefile of 657 zones/data rows: .. is simplified to one ...
1
vote
0answers
78 views

Is it possible to customize openFeatureForm of pyqgis?

I am a beginner in PyQgis. I am trying create a plugin, which will be used to AddFeatue,Delete Feature, and Edit the Feature. It is more customized than which is provided by Qgis (2.2). I am capturing ...
2
votes
2answers
236 views

How to get features based on their attributes using Python - special characters?

I want to get features based on their attributes and it works fine when I use this Python script: canvas = iface.mapCanvas() curLayer = canvas.currentLayer() it = ...
1
vote
2answers
264 views

How to show attribute table in the form

Is there any way to show the attribute table of a layer in a QtextBrowser or a QtableView on form? I did this but,(shows attribute table in a separate dialog) I have no idea, how to show it in my ...
3
votes
1answer
873 views

How to find the id of the last added feature using pyQGIS?

Is it possible to programmatically (in python) access the attribute info of the last added feature in QGIS 2.0 before edits are saved? I'm failing to find a way to get the ID and subsequently other ...
0
votes
0answers
41 views

Openstreet map loosing information

I succesfully created a shapefile from openstreetmap with the OpenStreetMap tool in QGIS 2.2. When I try to create a polyline layer, it says that there are 8000 values in the db file for the property ...
1
vote
1answer
180 views

draw extend of print composer map as rectangle in canvas

After defining the extend of my printed map in the printcomposer I can show the map center in the canvas by hitting "view extend in map canvas". So far so good. But is it also possible to show the ...
0
votes
1answer
61 views

Enhance the color associated with a band od an aerial photo?

I am using QGIS 2 on Windows 7 and have 4-band aerial photos loaded in to a project. I have switched the bands in order to make the photos display as color infrared. Does anyone know if you can ...
8
votes
1answer
1k views

Is the use of Google Earth imagery via the OpenLayers Plugin in QGIS legal?

I understand the terms and conditions WRT use of Google Earth imagery in external applications are strict. Years ago ArcBruTile offered such service in ArcGIS the legallity of which was ...
0
votes
0answers
36 views

Copy queried attributes of a shapefile to a new shapefile [duplicate]

I have a polyline-shapefile, which I have successfully read into python using pyshp module. My problem is to save the 2nd node of every line feature into a separate, single point file. I have ...
2
votes
1answer
238 views

How to generate routes that follow underlying road network?

I have a set of points (~2300 bus stops) and I have a network of roads that these bus stops lie on. When I have a bus route that goes from A to B, how do I generate the route such that it follows the ...
1
vote
1answer
95 views

Project one layer in qgis using projection CRS of another layer

I am using QGIS 1.6 and have imported a set of latitude, longitude points from a csv file as a layer. I also have another layer from a shape file. When I go to layer->properties for the second layer I ...
1
vote
1answer
173 views

QGIS custom action and button toggle

I've added a custom toolbar with some buttons to my QGIS 2 plugin. I'm wondering how to get the button toggled (pushed in-looking effect) using Python. I've gotten this to work for existing buttons ...
1
vote
1answer
150 views

Both dashed line and stroke line in parallel in the SLD

I just started in GIS. how can i draw in the GeoServer's SLD editor, both dashed and stroke line in parallel? like this, ----------------------------------- ___________________________________ ...
0
votes
1answer
117 views

PostGIS Group By Error [closed]

I am performing a pretty simple query in PostGIS 2.1.1 from within QGIS 2.2 for Windows (using the DB Manager plugin). I have a table with many columns and I am trying to perform a Group By function. ...
1
vote
2answers
80 views

PostGIS schemas doesn't show in QGIS

I try to use QGIS to display some data stored in PostGIS, some of schemas don't show except public; And it's a testing DB, so I have only one super user: postgres. I use PostgreSQL9.3. Anyone has some ...
2
votes
1answer
2k views

How to change GDAL version in QGIS to get ECW import to work

I’ve previously been successful in importing ecw into QGIS 2.0 but the same methods (for example How to add *.ecw files to QGIS 2.0 on Windows?) have failed with a fresh install of QGIS 2.2 with ...
2
votes
1answer
1k views

Exporting geodata from QGIS to Esri File Geodatabase?

For a project I need to create a set of vector data that I think I could do in QGIS. However the customer demands that the final data set needs to be delivered in a Esri File Geodatabase. Is there ...
0
votes
2answers
1k views

SLD parsing fail on GeoServer

I created a custom style on QGis and saved as SLD file. When i added to GeoServer, after validation it, i got an errors about parsing. Parsing failed for Filter: java.lang.RuntimeException: Unable ...
0
votes
1answer
169 views

QGIS and Oracle Spatial database - rule based system in future version?

I (a geographer not to familiar with IT stuff) want to start a pilot with QGIS at a municipality I work for. We store our data in Oracle databases. When trying to open these databases (QGIS 2.2) using ...