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

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4
votes
2answers
441 views

How to add a layer group using pyQGIS?

Good morning, I would like to know how I can create a new group in the layer manager using python code, someone could help me?
0
votes
0answers
4 views

Saving files in QGIS in yosemite 10.10.3

I just uploaded QGIS for use in Yosemite 10.10.3. It seem to work fine until I try to create a shape file or save anything at all. I get an error message that will not let me save anything to file. ...
2
votes
1answer
41 views

Tablets with QGIS data collection in the field + image capture?

Situation: – In a student project, we are building a cataster/registry of pollard trees. – We have geolocations of many trees and now we want to collect data about these trees in the field. – We want ...
4
votes
2answers
3k views

How do you import a .SHP into Sketch-Up?

Does anyone know how to use a .SHP in Trimble Sketch-Up? I have tried exporting to KML and CAD from QGIS, but the KML file doesn't read in Sketch-Up. Thanks! -m
2
votes
0answers
25 views

QGIS area calculation differs when on the fly CRS transformation enabled

When I open QGIS, add the layer, and calculate the areas of the shapefile via field calculator I get a different area than when I open QGIS and check "Enable on the fly CRS transformation" and ...
1
vote
2answers
723 views

Calculate area covered by a particular raster layer within polygons in QGIS

I am trying to extract information on vegetation cover within a set radius of point locations (my sites). I have succeeded in creating a new vector layer of circles with a 5 km radius around my sites. ...
0
votes
0answers
11 views

Is Images Concatenation in the Processing toolbox working in QGIS 2.8?

I want to make a single multiband .tiff image out of 7 bands that I have downloaded from USGS Earth Explorer and for that I used images concatination in the processing toolbox. I have loaded the 7 ...
0
votes
1answer
10 views

QGIS: Delete information from rasters and shapes that are out of country borders [duplicate]

I am trying to make topographic maps for some countries and show only those countries. I already created reliefs from SRTM-data and imported lake and river data from Natural Earth. Now I want to ...
2
votes
2answers
52 views

In QGIS how do I edit/save data which has no geometries?

In QGIS I can import data tables (CSV in particular) which have no inherent geometry (and no lat/lon columns) into QGIS. There doesn't seem to be any obvious way to manipulate that data (edit/save). ...
0
votes
1answer
29 views

Arcmap 10 Visual Basic

im wondering if there is a way to build something like this in Arcmap 10 since VBA isnt supported anymore. Its for my Thesis. I need a tool to handle Polygons and their Information like in the ...
0
votes
2answers
115 views

How do I mask a raster in TileMill?

I've tried just about every single TileMill compositing operation on the vector and raster layers in question, and I have to admit that I can't figure it out: How the heck can I mask a raster with a ...
8
votes
2answers
1k views

How can I create random points along a polyline in QGIS?

I am trying to create random points along a polyline shapefile in QGIS. Basically, like the 'random points' tool in 'research tools' but for polylines instead of polygons. I have tried converting ...
-1
votes
1answer
23 views

How to take only relevant rows from database, based on common codes

I have a shp file that is missing some data, e.g. attributes. I have the missing data in a csv file. How can I get ONLY the relevant rows from the csv file added to the current shp file's data table? ...
2
votes
1answer
377 views

query / filter on attribute tables with external tables joined

i tried to do some queries on joiend table fields ... i've got/found some answers concerning version 1.8 - which result in "use select + export to create a combined dataset" so i just did some tests ...
-3
votes
0answers
17 views

Can't find QGIS C++ API header files

QGIS C++ API header files such as "qgsapplication.h" are not found anywhere on my file system. I have installed QGIS 2.8.1 on Linux Mint 17.1.
2
votes
1answer
2k views

How to create a line in a given distance to an existing one?

I am looking for a possibility to create a second line in a given distance to an existing line. The existing line is curved, so simply create parallel line segments with CAD tools will not work. Any ...
0
votes
3answers
19 views

How to find which areas/regions a list of lat/lons are in?

The Australian Bureau of Statistics (ABS) issues Esri shapefiles or MapInfo files which have a code # for each geographical area at various 'resolutions' and I have a database with a column of ...
10
votes
3answers
12k views

How to import coordinate data from excel into QGIS?

I have an excel file containing data collected over many years as latitude and longitude coordinates for archaeological sites - how can I import it into QGIS as a new layer?
0
votes
0answers
19 views

Raster Points to Shapefile [on hold]

So! I would like to be able to do this in QGIS, but if ArcMap would be better, feel free to say so. I have raster data for % Ice coverage of the Great Lakes. Each point has its assigned percent ...
-2
votes
0answers
31 views

Make a polyline turn smoother

Let's say that I have a polyline (kml/GeoJSON/shapefile/whatever) which looks like this (just an example) I am looking for a way to automatically transform the polyline so that it turns smoother. I ...
3
votes
2answers
575 views

How to add Georeferenced PDF as layer to QGIS 2.0?

I have some georeferenced pdf's that I would like to open in Qgis. I have read that GDAL version 1.8 and higher will support pdf, and I have GDAL 1.10 installed with Qgis 2.0 on windows 7, But when I ...
0
votes
2answers
53 views

How does QGIS Identify Features plugin work i.e. what is logic behind it?

I'm new to QGIS and python as well. I need attributes and their values of a selected vector layer, in the similar manner as Identify Feature works only difference is I don't wish to show them in a ...
0
votes
1answer
38 views

How to turn a shapefile into a table?

How do you completely turn a shapefile (created with QGIS, including .shx and the other 4-5 files) into one tabular dataset. I am actually doing this when I import the shapefile into Postgresql ...
1
vote
1answer
22 views

Buffer View With SpatiaLite and QGIS

Creating a dynamic buffer with PostGIS the following view is working: CREATE VIEW buffer500m AS SELECT gid, st_buffer(geom,500)::geometry(polygon,31492) AS geom FROM point; Unfortunately this query ...
1
vote
0answers
25 views

Topology in Arcgis and QGIS

I have been studying topological methods like 4 intersection , 9 intersection, dimension extended and CBM (calculus based methods) like RCC-8. I want to know which of this method is used for ...
1
vote
0answers
21 views

PostGIS Geography data type not displaying in QGIS

I am trying to display data held in the PostGIS Geography type on a map in QGIS. Whatever I do I can't get it to work. Here is the SQL that creates my data - a single point in London. CREATE TABLE ...
1
vote
1answer
31 views

Symbolize points in the same shapefile differently

I was wondering if there is a way to edit the appearance of the points in the same shapefile. I have a shapefile with fifty points in which dead wild animals were found but 5 of them were positive to ...
3
votes
1answer
21 views

Is it possible to hide icons in the QGIS print composer?

Is it possible to hide icons in the QGIS print composer? I have used the Customization page in QGIS to create an ini file to simplify the QGIS interface for my users, but I can't see how to do the ...
4
votes
1answer
370 views

QGis Save Raster as Rendered Image

In QGIS 1.9.0 Master, when you right click on a raster in the Layers Panel and select "Save As", you can select the output mode to be "Raw Data" or "Renedered Image". When selecting the Rendered ...
1
vote
1answer
37 views

How to fill the column in attribute table with same values?

I have about 19000 records, I added new column and I would like to fill it with string values (eg. brand)- same value for all rows. I'm not considering copy/paste. I know I could do it with exporting ...
1
vote
1answer
25 views

Open Layers Plugin not working in QGIS 2.8.1 [duplicate]

I am using QGIS 2.8.1. I have installed the Open Layers Plug, however it is not showing up in my list of plugins. I confirmed it's installed in the plugin manager. Is anyone else having this issue?
1
vote
2answers
27 views

QGIS error when importing .asc LIDAR data

First let me say that I am novice in GIS department. As archaeologist I had only some courses 8 years back when i was still studying. Now, the problem: When I try to import .asc as raster layer I ...
5
votes
1answer
167 views

How to create a python plugin in QGIS 2.4.0?

While I am learning to create a python plugin in QGIS 2.4.0, I have followed the proceedure expalined in ...
1
vote
1answer
39 views

How can I geocode CSV by postcode, using existing point data, in QGIS?

I have a very simple MapInfo workflow for geocoding a CSV file which contains UK postcodes, based on an SQL select query referring to point data for postcodes. This is simple. Using Mapinfo open the ...
1
vote
1answer
38 views

QGIS - split polyline

I need to create a shapefile with crossed streets. I can't split the lines to number each segment with the house number ranges.
2
votes
0answers
34 views

What does the Join button in the categorized style tab do?

I'm just studing gis, and I use QGIS. I have found in the layer properties some JOIN and don't understand how can I use It? Maybe someone can help me to undersan it, thank's!
0
votes
0answers
9 views

Cannot connect MSSQL server from QGIS

I'm trying to connect to an MS SQL 2012 database from QGIS 2.8 on Windows and get this error: [Microsoft][ODBC SQL Server Driver][SQL Server]Cannot open database "xxx" requested by the login. The ...
0
votes
1answer
168 views

QGIS web client mobile/tablet viewer

I have been looking at OL3-mobile-viewer as an option to make my maps more accessible. Unfortunately I cannot figure out what I need to change to hook it up with my existing QGIS server and ...
1
vote
0answers
37 views

Put output of SAGA algorithm of Processing model in R script

I'm trying to combine the Variogram Cloud model of SAGA with an R script inside a Processing model. First, the R script is: ##Vector processing=group ##showplots ##Layer=table ##X=Field Layer ...
1
vote
1answer
111 views

qgis refresh button for attributeactions

QgsVectorLayer* vLyr=static_cast<QgsVectorLayer*>(aktLayer->qgsLayer); vLyr->actions()->addAction(QgsAction::ActionType::OpenUrl, "Link im Webbrowser öffnen", "[% "+sAttribute+" %]" , ...
1
vote
1answer
22 views

QGIS : exported PDF resulting in misaligned Bing Aerial and vector layer [duplicate]

I'm working with QGIS 2.8.1. I have a project with CRS: 3947 (Central-Western France) and several layers in the same CRS. I have not activated the 'On the fly' CRS transformation. I add the Bing ...
1
vote
1answer
41 views

How to upload GeoJSON to CartoDB in a CRS that is not lat/lon?

I'm pretty sure I need to convert the coordinates in my GeoJson file to EPSG:3857 for them to play nicely with CartoDB, but I don't know what coordinate system they are currently in. The original data ...
0
votes
2answers
235 views

Web map viewer for QGIS Server and PostGIS

I have succesfully installed and configured QGIS Server. I tried WMS and WFS via QGIS Desktop and it works perfectly. Now i am looking for a web map viewer to display (only read (WMS viewer i ...
2
votes
1answer
36 views

Tool Bar visibility in PyQGIS

I am creating a plugin for Qgis 2.6 and when my plugin loads up i want to disable the visibility of some of the tool bar. I was able to set the visibility for various tool bars like ...
0
votes
0answers
22 views

Why won't my Mac load MrSID files?

We are trying to view MrSID files using Mac QGIS Wein and we have installed the KyngChaos versions with all the GDAL updates, ECW, MrSID plugins and Newest NumPY. What are we missing? Mac OS 10.8.5 ...
3
votes
2answers
2k views

How to load MrSID raster layer in QGIS on Mac OS?

I have just upgraded QGIS to 2.0 and now I can't load my SID raster layers. I now remember that getting them into 1.8 was a performance but I can't remember all the details. I have downloaded the ...
1
vote
0answers
16 views

Points in Polygon results in PNTCNT=NULL

I am trying to use the QGIS (2.6.1) vector analysis tool "Points in Polygon". The points originally came from a KML file and the polygons I created new. I initially had a warning about different CRS ...
10
votes
1answer
325 views

Open-source software for managing terabytes of different formats of geospatial data?

I have a problem that I am sure many GIS Teams or Departments have which is how to find, keep track of and manage multiple different datasets from multiple sources. I have read the responses from a ...
1
vote
1answer
34 views

How do I read and modify heat map value classification on QGIS?

I am trying to create a heat map on human encroachment using the heatmap plugin of QGIS 2.2. I have no problems creating a good looking raster file using a 2 km radius but I can't find my way around ...
2
votes
1answer
35 views

How can QGIS Field Calculator sum values from a spatially joined table?

Can the Field Calculater be used to sum values from a related table via a Spatial Join? I have two vector polygon layers A and B, each with a numerical column VALUES. I want to update VALUES in ...