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

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QGIS linked to camera for GPS based triggering?

Has anybody done this yet? I'm new to QGIS and have just started exploring. I'd like to integrate flight lines and camera triggering if anybody can direct me to the right forum or area. Thanks!
1
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0answers
157 views

Saving Android app QGIS and Ministro 2 with right qt libraries onto USB for installation onto tablets without internet?

I need to get the ministro 2 app onto a USB to install onto android tablets for the QGIS app to work. I can get both apps on OK but not the required qt libraries in Ministro 2. Reason being there ...
4
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1answer
435 views

getting a plugin path using Python in QGIS

How to get a plugin path using Python? I tried QgsApplication.pluginPath() I got u'/Applications/QGIS.app/Contents/MacOS/../PlugIns/qgis' But I actually store the plugin in ...
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1answer
644 views

Create raster with distance to feature

I'm new to GIS (and QGIS in particular). I'm trying to create a raster layer that contains the distance to shoreline for a certain region. I have both vector layers of the shoreline (line) and the ...
6
votes
1answer
4k views

Problem with import qgis.core when writing a stand-alone PyQGIS script

I am trying to write a stand alone python script in windows 7 that uses qgis.core and various other qgis libraries. I have found an old question on this subject here: How to write standalone Python ...
2
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1answer
168 views

Bing Aerial (OpenLayers) won't show below 1:2257

I'm having this problem with open layers (plugin v. 1.3.5 - QGIS v. 2.6.1 Brighton) where it does not display the map when zooming in past 1:2257. If I zoom to 1:2556 (or anything below it), I won't ...
1
vote
1answer
287 views

OpenGeo Explorer for QGIS 2.6.1 - No module named ogr2ogrtopostgis

I'm trying to use the OpenGeo Explorer plugin for QGIS (v2.6.1) to import shapefiles to my PostGIS database. I can connect to the server, but when I try to import, I get the following error: No module ...
3
votes
1answer
483 views

Problems using r.reclass in QGIS: invalid reclass rule error?

I need to reclass some rasters, but i am having a couple of problems, i can´t generate a new raster with the reclassification using the r.reclass of GRASS. For the question here i´m using as example ...
10
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3answers
2k views

Cannot run standalone QGIS script

I've been trying, along with this post, to run a script in OSGeo4w Shell, outside of QGIS. But I get the following error: ImportError: No module named qgis.core I have also read the following ...
1
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2answers
2k views

GEarthView plugin doesn't work

I'm trying to install the GEarthView plugin but without success. The following message pops up after installation: "No module named zope.interface" What is the problem? QGIS 2.6.0 Windows7 (64Bit)
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34 views

QGIS Cloud Plugin is broken, no module named ogr? [duplicate]

When I try to install QGIS Cloud plugin I get the error message 'Plugin is broken, no module named ogr' Same as in this post with no solution ”No module named ogr” when installing QGIS plugins Is ...
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2answers
242 views

How to import editable layers from other QGIS projects?

I have a QGIS project that I have spend a lot of time styling over a 80 layers and it seems to have somehow become unstable. I believe that I renamed a folder containing some layer source files which ...
2
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0answers
71 views

Via PyQgis how to refresh a modified CSV layer without having to reopen the file? [duplicate]

UPDATED: With an CSV layer Qgis workspace [loaded as a delimited text layer], an external algorithm is ran; outputting (writing) new values to certain rows in the layers source CSV file. The writing ...
1
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1answer
590 views

Writing a shapefile using OGR, from Shapely Geometry - No feature added Error

I am trying to write a shapefile from a Shapely geometry using PyQGIS in the QGIS 2.6.0 console. Lines of code before the OGR method to write shapefile: extnt = poly.extent() # gives a QtRectangle ...
1
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1answer
174 views

Loading .shp files onto Garmin eTrex 30

first off, I've looked here and here, and other places as well, but I can't seem to find anything that solves my issue. I have a Garmin eTrex 30 that I am using with QGIS 2.0.1 and Mac OS 10.9. I ...
6
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0answers
314 views

Why is QGIS georeferencer much faster on Windows than Mac?

I just went from temporarily using a Windows 7 machine with 4GB of RAM and no video card as far as I know. I'm now using a mac with 16GB of ram, etc. Its a much more powerful machine. However, QGis's ...
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0answers
104 views

QGIS MySql database queries over 4000

When i open file of QGIS 2.6.1 with 32 layers whose tables all come from the same database, i see that by just opening the file, QGIS already sends 4100+ "SELECT..."-questions to the database, and ...
2
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0answers
68 views

How to change values in a raster file at particular positions?

I have a collection of coordinates which comes from a QGSGeometry object. The shape is a polygon. example: qgsGeometry [[(75.2172,17.6566), (75.8499,17.9613), (75.5218,17.2113), (75.2172,17.4574), ...
1
vote
1answer
193 views

Using r.mapcalculator in Python console?

I'm trying to use the r.mapcalculator algorithim in a python script, but I'm having problems in using the r.mapcalculator to tranform a raster layer with float values into integers. Using the ...
2
votes
0answers
107 views

How to customize the visibility of buttons in QGIS?

The built-in toolbar named "Composer" has an icon "Duplicate Composer". I wish to toggle the visibility of this button in the toolbar. How do I achieve this using pyqgis?
2
votes
2answers
1k views

Vector -> Geometry Tools -> Extract Nodes equivalent in PyQGIS API

My question is fairly straight-forward. Would anyone know the PyQGIS equivalent of the Extract Nodes tool in QGIS? I don't seem to find it in the API documentation. If you do, kindly share the ...
1
vote
1answer
236 views

QGIS how to 'compare' points (latitude/longitude) w/address data (zip) to a zipcode boundaries shapefile

Hello my fellow GIS brethren, I am a geography major (gis) alumni who can't remember what he learned in college! It's been so long since I dealt with geospatial data and I can't remember the best ...
2
votes
2answers
203 views

How to fix the broken MGRS Tools plugin?

Here the case: i have a plugin installed in .qgis2/python/plugins that remains broken and i cant make it work. I've found it here https://github.com/volaya/mgrs-tools. If any of you know the way to ...
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3answers
192 views

Appending data in PostGIS database with QGIS?

I 'm running postgis with qgis 2.6. I created a database and tables that i need to update with new datas provided with shapes. I cannot find how to insert them in table. All attributes both shapes and ...
1
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1answer
59 views

georeferenced raster coordinates

In QGIS 1.8 I have two rasters derived from the same multi-band tif image (1) ndvi - each pixel contains NDVI values. Using /Plugin/Analysis Point Sampling tool a new vector layer is created and the ...
6
votes
2answers
1k views

How do I view GTFS data in QGIS?

I would like to use QGIS to create my map. One data feed is the gtfs regarding to bus routes. I can view it on Google Earth (although laggy), but when I tried to import the .kml into QGIS, it just ran ...
1
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1answer
74 views

How to sum up values of neighbouring rasters? [duplicate]

I have a raster (25X25 meter) and I will make a new raster where each cell get the value of the sum of all the raster cells in a radius of 500m. I use QGIS. What is the best option to do this?
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0answers
130 views

QGIS Mac OSX version cannot batch write output files after rasterization

Happy new year everyone, I have been trying to batch rasterize a series of .shp files using QGIS for Mac OS X, and keep coming up against a strange problem. I am using the QGIS 2.6.1 user interface, ...
1
vote
1answer
34 views

QGIS explode line function fails with OSM file

I am exporting a small extract from OSM. I load the lines(layer 1) into QGIS and apply the function Explode lines. I get the error: Algorithm Explode lines starting... __len__() should return >= 0 ...
2
votes
1answer
5k views

Opening Esri Personal Geodatabase (*.mdb) using QGIS?

Is it possible to open an Esri Personal Geodatabase (*.mdb; ArcGIS 10.2) in QGIS 2.6? Previous versions were right.
6
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2answers
2k views

How can I access `processing` with Python?

I want to access the explode lines function in Python outside of QGIS from a standalone script. What module do I have to load in order to use it? How can I access processing? from qgis.core import * ...
7
votes
1answer
420 views

Label placement on rotated map in QGIS

I'm a newbie to GIS and QGIS (please be nice to me). I'm working on a map for a garden/arboretum catalogue using QGIS 2.6.1. The arboretum has been surveyed using GPS, and the specimen trees and ...
2
votes
2answers
414 views

How to extract elevation values at line start and end points from a DEM?

I am new to the whole gis-experience and need your help working with QGIS. I have: DEM raster with heights (3d) line-shapefile which contains the rivers (2d) I need: heights for "start" and "end" ...
4
votes
1answer
704 views

How to find Chainage of points using QGIS

I have two types of Road shape files. Road (Polyline) and important points (waypoints) along the road. Both of these shape files are prepared using GPS. I want to find the chainage of the points. Is ...
2
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0answers
39 views

What should i do if the Repository tab “Status” was indicating “unavailable”.? (using proxy server)

In the plug in Repository tab. The "Status" was indicating "unavailable". I tried "hawkens" suggestion about the HTTPproxy thing but it didn't work (the network that I am using is a proxy server). ...
0
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2answers
383 views

changing pixel values using raster calculator Qgis

How could I convert a value of 32767 to a 0 using raster calculator in QGIS?
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2answers
153 views

How do I get UTM projected areas from a shape file created in QGIS?

I create a polygon (or point or line) .shp file in QGIS and it is automatically saved as WGS (as I understand, correct me if I'm wrong). That is fine by me despite being a bit inconvenient. Then I ...
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0answers
91 views

How do I step into the C++ functions from an external Python app I'm debugging?

I just wanted to see how to step into the C++ class QgsVectorLayer()'s methods from the python call to QgsVectorLayer(self.uri.uri(),'foo','postgres'). I'm trying to debug and it trying to step into ...
3
votes
1answer
169 views

How do I make curved labels for polygons in QGIS 2.6.1?

I have been able to find answers on how to do this in older versions of QGIS, but can't seem to come across anything that deals with the latest installment. I need a way to make labels curve to ...
3
votes
0answers
303 views

SAGA is not working within sextante (QGIS processing installed in Ubuntu)

Recently i decided to start working in Ubuntu (version 14.04). My first step was to add the ubuntugis-unestable repository, and then proceed to install SAGA, GRASS, OTB, QGIS and the bindings between ...
2
votes
1answer
431 views

How to extract percentage of land cover from a raster according to multiple shapefiles?

I have a raster map that represents land cover of a region, and different shapefiles (total 120) in the same region. I want to know the percentage of every land cover for each shapefile. For example, ...
0
votes
2answers
2k views

Import Aerial Images from Google into QGIS?

QGIS 2.6.1, Windows 7 I am looking to import an image from Google Earth into an existing QGIS project. Is it possible to download geo-referenced images from google maps (or google earth) and import ...
5
votes
1answer
2k views

How to compute Walking and Cycling Isochrone maps using QGIS & pgRouting?

Just installed QGIS as I believe I should be able to produce walking and cycling isochrones from a specified point. I have done this pretty easily before using ArcMap, however, I am really struggling ...
2
votes
1answer
214 views

Revert qgis 2.6 installation to qgis 2.4 through OSGeo4W Advanced installer

It is possible to return to qgis 2.4 OSGeo4W installation when I have qgis 2.6? I want with advanced installer. Thanks,
2
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1answer
79 views

remove unwanted areas which are not inside the boundary of second raster

1 raster layer - global map ; 2 raster layer - berlin I cropped out 1 layer using extent of 2 layer and then overlapped these two layers however I see that 1 layer still has areas apart from ...
2
votes
2answers
386 views

Call output files in temporary directory through Processing Toolbox (python)

I need to create temporary files as intermediate output to be used with processing algorithms. So, I implemented this: Processing.runalgorithm("grass:v.to.rast.attribute", ........, None) This line ...
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2answers
404 views

Issue in the popdown box (QComboBox) in QGIS 2.6 Python plugin

I had developed a plugin that counts the number of features for a layer in Qgis2.6. When i load a layer say 'Airport' for first time and click the pop-down box in the plugin,it lists the airport ...
6
votes
2answers
809 views

How to symbolize features with NULL values in graduated symbology?

I have a polygon feature dataset, and an attribute from a different table that I join (one-to-one) within QGIS in order to symbolise the attributes as a choropleth map. However, not all polygon fields ...
2
votes
1answer
73 views

Does anyone have any tips on figuring out why a Vector Layer didn't load in Pyqgis?

This is a general question. I'm stepping through the pyqgis code and the layer isValid() is always False. I don't see any error messages showing any reason why it wouldn't load. Other similars have ...
2
votes
1answer
406 views

How to scale SVG symbol based on zoom level in QGIS?

I am wondering if there is a way to scale SVG files I have stored as blob in a Spatialite database according to the current zoom level in QGIS. My hope is to have the SVG icon resize itself when the ...