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

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2
votes
1answer
140 views

Qspatialite plugin problems with queries using inner join

I'm trying to create a layer in QGIS from a sqlite database using a query from 2 tables: one has spatial data and the other doesn't. When I build the query using Qspatialite using the 'Advance SQL ...
4
votes
2answers
680 views

GPS-Plugin and Garmin data

I am an avalanche specialist and I use a GPS Garmin 62 for fieldwork. I for example use waypoints to measure snow depth in avalanches for volume calculations. When I add a waypoint in the garmin ...
4
votes
2answers
324 views

How to iterate over selected layers?

In QGis by pressing shift or ctrl keys a user can select multiple layers in toc. How can a python script iterate over selected layers? I'd expect a iface.selectedLayers() but I can find only ...
6
votes
4answers
4k views

Qgis - Is there a way to split a polygon layer with a line layer?

I am drawing administrative regions that have boundaries follow streets in another layer. As these streets are pretty long with many vertices, I don't want to re-trace them. I am looking for a way to ...
4
votes
0answers
272 views

What to do about Geoserver WPS Warning “Could not get a ServiceInfo”?

This is the warning i am getting when i try to use this WPS service from QGIS, and the processing take a long time, but doesn't terminate, what might be the problem? 17 Oct 12:33:25 INFO ...
5
votes
2answers
1k views

Where can I get information on QGIS beta versions?

While searching for information on some qgis functionality on the web, i noticed several times, people using version 1.9, however this version is probably some beta (or so i thought) but i cant seem ...
0
votes
1answer
522 views

How to create a custom projection of PRS92 and UTM 51N for the Philippines? [duplicate]

Possible Duplicate: How to define new custom projections in QGIS? How do I create a customized CRS parameter in quantum GIS? I'm try to create a projection of PRS92 and UTM 51N. This ...
2
votes
1answer
280 views

Can I Dynamically Update Symbol Ranges?

Background: I'm currently trying to dynamically change the ranges for a layer with new style graduated symbology. Problem: I thought it may be as simple as updating the ranges for the existing ...
1
vote
2answers
165 views

Has Action behaviour changed between 1.7.4 and 1.8.0?

I have an Action that loads raster layers (.jp2) into the current QGIS window. This action has been working great in version 1.7.4. I have now upgraded to 1.8.0 for many reasons, but the same Action ...
0
votes
3answers
381 views

Run function if item in QComboBox is selected

I got another issue writing a plugin to convert three shape files into an .obs input file. I created a UI (Qt) with a QComboBox to select a layer (that works fine). As soon as one of the layers in the ...
1
vote
1answer
185 views

Count the number of symbols in a 'new symbology' renderer from pyqgis

Background : I create a lot of symbology using 'saturation' ramps - for want of a better term, e.g. where the hue and value of each symbol stays the same, but the saturation changes. I couldn't figure ...
3
votes
3answers
1k views

How to sum raster image values with vector overlay

I'm new to this and haven't been able to figure out how to do this on my own. Here's what I want to do ... I have two files: a raster image of land use data and a vector-based shapefile of my ...
3
votes
2answers
865 views

QGIS How to use Query Builder with a Joined table

When I join a layer with another layer all the attributes are correctly displayed in the first layer. However when I use the Query builder (Layer - Query) and then use Zoom to layer, nothing is ...
0
votes
1answer
2k views

function, return, 'instancemethod' object has no attribute '__getitem__'

I'm still trying to write a python plugin to create an input file for an urban climate model out of three shape files. Now I stumbeled into another problem, that I think is an easy one, but I just ...
7
votes
1answer
285 views

How to migrate SVG-based styles for QGIS to other computers?

I'm working on a project that has involved creating many recolourable SVG icons and bringing them into QGIS. These are then used in layer symbologies, with these subsequent layer styles exported as ...
3
votes
3answers
7k views

Editing a KML file or converting KML to Editable format with attributes

I'm using QGIS. I'm trying to either edit a .kml file someone else created in Google Earth or convert it to another editable format (like a .shp file). I've read the following threads without really ...
3
votes
2answers
173 views

Can I Combine Areas in Quantum GIS?

I am working on a provincial annual health bulletin. I have a .shp file that has GIS data about the smallest divisions called "GN Area". Two or three GN Areas form one MOH area. I want to get the ...
1
vote
1answer
191 views

Analyse spatial data and extract results in tabular form in QGIS

I'm sorry if this question is badly framed, I only started with GIS and QGIS 2 days ago so I don't know any terminology yet - I'll try to explain as best I can. I have 2 layers in QGIS (1.8, on ...
4
votes
1answer
2k views

Installing QGIS on Mac OS 10.7. “The GDAL framework is required.”, and yet I have it

what did I miss? I'm trying to install QGIS on my MacBook (Mac OS 10.7). I'm following these instructions: https://sites.google.com/site/eospansite/qgis-installation/installing-qgis-1-6-on-macosx It ...
2
votes
1answer
819 views

How to fix The procedure entry point squlites3_open_v2 could not be located in the dynamic link library squlite3.dll? [duplicate]

Possible Duplicate: How to fix QGIS error “Entry Point could not be located”? I downloaded QGIS to my laptop (Window 7 64b) yesterday but when I click on the desktop logo I get the ...
1
vote
0answers
443 views

How to reproject a raster in QGIS? [closed]

I wanted to reproject raster file from UTM to decimal degree in QGIS version 1.7.1 or 1.8.0.. I could reproject one raster file before in QGIS Version 1.8.0. I have tried again, but now we cannot ...
10
votes
2answers
8k views

How to reproject a vector layer in QGIS?

I have some shape file which is in UTM. I wanted them to convert to Decimal Degrees in QGIS. Thanks.
2
votes
1answer
271 views

Hyperlinking to PostGIS Layers and Zip files with QGIS Actions

I previously asked a question about hyperlinking data in QGIS that gets loaded into QGIS (see post: Hyperlinking in QGIS - Add Data to current window). A user provided me with the code, which works ...
2
votes
0answers
58 views

QGis, add dialog and classes to plugin

what are the steps to add files that represent a uidialog(draw with QTDesigner), and add the necessary python class files, using the default makefile provided with qgis plugin builder? thanks,
-1
votes
1answer
231 views

Imported points from csv file (latitude, latitude) don't show up in a post code shape file

I can produce a point vector layer by importing latitude and longitude info from a csv file in a new project. After saving this file as an ESRI shape file I can import it in a Postal Code shape file. ...
2
votes
1answer
196 views

Is it possible to rectify an aerial photo with known control points in 3d, in QGIS?

Bonjour, Peut-on avec Quantum GIS redresser une photo aérienne avec des points caractéristiques connus en 3D (XYZ) ? -- Translation: Hello, Is it possible to rectify an aerial photo with known ...
3
votes
1answer
506 views

Can I move points by editing x/y in attribute table?

Im new to QGIS and I just cannot figure out how to do this one hopefully simple thing: I have a bunch of points in shapefile and i need to move some of them around by hand / coordinates. I've ...
3
votes
1answer
666 views

Is it possible to change the plugin folder location?

Sorry for the vague header but i found no better one. This is the situation: I am teaching a GIS course in a local collage using QGIS (qgis4w). The way our lab pc's work is that they delete all added ...
4
votes
1answer
3k views

How do I edit shape file attribute tables so they all have the same information?

I am trying to merge several pipeline shapefiles using GEOMERGE but it cannot complete the function because they have different column definitions. So I need to edit the attribute tables so that ...
2
votes
1answer
577 views

When I finish drawing a polygon, it disappears again (although appearing in my attribute table)

I'm working with Quantum GIS at this moment. And as the title says, when I finish drawing a polygon, it disappears again. The new object does appear in my attribute table and in the legend/'filling of ...
1
vote
5answers
391 views

Error when starting up Postgis Manager plugin in Quantum GIS

I receive an python error when starting the postgis manager pluging in QGIS. This problem started when moving from QGIS 1.7.0 to QGIS 1.8.0 Lisboa. I reinstalled everything but that didin't fixed ...
0
votes
1answer
68 views

How to view the class files of QuantumGIS for further development?

I have been searching class files of QGIS for a while for customisation and edit it for a project..But I am unable to get or download the files...can anybody give some references if we can really view ...
11
votes
4answers
9k views

Feature comparison between QGIS and ArcGIS for Desktop [closed]

I am learning to use QGIS and ArcGIS for Desktop but I cannot find the differences between them. What are the differences between the capabilities of QGIS and ArcGIS for Desktop?
1
vote
0answers
184 views

How to view error feedback in qgis when testing connection to postgres database?

Using qgis 1.8 on Ubuntu 10.04 with Postgres 8.4.13 I am creating a new (and my first) Postgresql connection in qgis. I can connect to the user and the db using the pgsql client. ...
3
votes
1answer
599 views

Get extents of vector shape features in python

i am just wondering if it is possible to iterate through vector features and return the extent per feature without clipping the vector shape? The code looks like this and comes from the ...
1
vote
1answer
168 views

Unable to load the GADM data in QGIS

I have downloaded the shapefile of Mexico's Admin Boundaries from the GADM site but I am not able to load it in QGIS. It keeps giving me the following error, ...
7
votes
4answers
5k views

Using android phone to plot GPS points?

I was wondering if I could use my android phone (HTC Wildfire) to plot gps points and export these into GIS software (I have QGIS and MapInfo). Thanks, Alan
0
votes
0answers
68 views

QGIS anno labels

Is there a way to copy and paste Anno Labels in QGIS? I have a layer that contains Parking Restriction information e.g. No Waiting or Limited Waiting 1 hour Mon - Fri 9am - 10pm etc. There are lots ...
1
vote
0answers
70 views

QGIS Loaded Plugin Access

Fellow Users, Can you plz tell me how I can programmatically (or from the console) access the loaded plugin list? I tried: QgsProviderRegistry.pluginList() but got: TypeError: ...
10
votes
1answer
359 views

Is it possible to edit layers from a FGDB - File Geodatabse in QGIS?

I think I've found the answer (you can't edit FGDB's) but there seem to be few reports around that it is possible to edit FGDB files in QGIS. Can anyone advise if it's possible to setup QGIS ...
4
votes
1answer
540 views

Is there a recipe for large shape files to be used in an Android App?

I am very new to GIS and I am diving into cartography and mapping because of an Android App that I am currently developing. I want to display environmental data, more precisely noise pollution data on ...
3
votes
1answer
155 views

How to draw parallel or curved labels for OSM data in QGIS?

I'm trying to recreate a Google style map using OpenStreetMap data and QGIS. I've been following underdarks many wonderful guides but am getting stuck at the labels. The OSM data was taken from ...
4
votes
1answer
203 views

Export shapefile to filegdb with specific projection

I tried to export a simple shapefile with polygons via "save as" > Format "ESRI fileGDB" and choose "DHDN / Gauss-Kruger zone 3". So there is the error message : "Error: Failed at creating table for ...
1
vote
1answer
164 views

How to add a custom SymbolLayerV2 to a Vectorlayer in QGIS

I'm trying to add a symbolLayer with a line-decoration (line-arrow) to a vectorlayer of linestrings. what i am trying at the moment is to create a new layer and set it's QgsLineSymbol with a list of ...
3
votes
1answer
507 views

Creating Selection MapTool in PyQgis Custom Application

I'm developing a custom GIS application using PyQgis API. How can I let the user select features on the map using Maptools? I would like to replicate the select feature there in Qgis to make the ...
1
vote
1answer
414 views

Converting arcpy based python script to OGR for semi-automated Metadata creation

I have created a script to automatically generate base ANZLIC standard metadata using arcpy based coding. Can anyone help me convert it to OGR/GDAL python? This is so that it can be run in QGIS and ...
1
vote
1answer
229 views

python multiprocessing error in QGis (Windows)

I have this error when I try to use Manager() from python multiprocessing library. (Just start QGIS open Python console and execute the two following lines) >>> import multiprocessing ...
2
votes
1answer
1k views

Import GPX to QGIS with WGS84 [closed]

When loading a GPX-File in QGIS it is not referenced on WSG84. It´s shown with wrong coordinates. Settings are WSG84.
-4
votes
1answer
356 views

Looking for a user-friendliness & functionality comparison for ArcGIS and QGIS

what is a user-friendly (ease of use) and functionality comparison for ArcGIS and QGIS? derived from Which topics are fundamental for ArcGIS? QGIS and gvSIG comparison
3
votes
1answer
932 views

Measurements in QGIS 1.8.0

I am using qgis version 1.8.0. My project contains tiff and several "shape" layers. The CRS is WGS 84 (EPSG:4326). I am attempting to measure the areas of the layer polygons. However if I click on the ...