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

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25 views

Keyboard shortcut for “delete” object in print composition?

Is it possible to have/add a shortcut from the keyboard to "delete" an object in print composition? I use to add objects from models then I have to print and delete them to add obects from another ...
3
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2answers
81 views

How to preserve formulas in XLS cells when working in QGIS?

Opening layers directly from XLS spreadsheets is a very useful (if not well documented) feature of QGIS, but I can't seem to be able to properly import cells where the contents of the cell is the ...
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1answer
60 views

How to replace characters to eliminate encoding errors?

Working with Qgis, I have a table representing streets. Attributes inlude street name, length, pavement and some others. Unfortunately, all names with ä or ö or ü display 'odd characters' like Ã1/4. ...
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2answers
23 views

Selecting/Exporting points from one layer that do not overlap with the points from another layer in Qgis

I am working with QGIS and have the following problem to solve: I have 2 point layers. Layer 1 has more points than Layer 2 but all points of Layer 2 have the same position as Layer 1. I need to find ...
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22 views

Depending on the zoom level line appears fragmented

I imported a polyline shapefile in QGIS ( 2.4). Depending on the zoom level line appears fragmented ( see Appendix). Can someone help me? Many thanks for the help Best regards
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1answer
29 views

What packages are required to install C++ API on Linux Mint 17?

What packages are required to install C++ API on Linux Mint 17? I already have access to the Python API (installed via “python-qgis” package), but no C++.
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54 views

Geographical/Spatial analysis

I've got a vast number of layers (10) indicating a geographical phenomena from different dates. In ideal world, the phenomena should be in the exact same spot in all the different layers, or at least ...
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0answers
36 views

Displaying symbology outside map canvas window extent?

Say we have equally distributed x,y mesh vector file. Each coordinate has a map-unit based diameter circle symbology. If we zoom into a region of the map canvas far enough, some centroids exist ...
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2answers
73 views

How to properly get the slope from an ASTER DEM in QGIS?

I have inserter a raster dem layer from ASTER satellite and I want to get a raster that has the slope of the area. I use terrain analysis > slope but the output is so wrong. Why is that? here is the ...
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1answer
24 views

QGIS clipper problem when mask used

I have encountered a problem with the raster>extraction>clipper function in QGIS when a mask layer is used. In the image below the diagram on the left shows part of the original raster. The diagram ...
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1answer
22 views

QGIS Add PostGIS layer: restricting to single schema?

My primary PostGIS database has 12 schemas (schemae? TNIRN...), some of which have nasty-sized tables. The DB is on localhost, on my own machine. For the most part, the actual working tables are in ...
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1answer
24 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 ...
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21 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 ...
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45 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.
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2answers
144 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 ...
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1answer
44 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 ...
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1answer
30 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
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1answer
72 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 ...
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3answers
26 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 ...
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0answers
42 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 ...
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1answer
47 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 ...
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0answers
40 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 ...
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1answer
27 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 ...
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1answer
263 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?
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1answer
48 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 ...
3
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1answer
25 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 ...
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0answers
20 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 ...
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2answers
75 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 ...
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0answers
30 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 ...
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1answer
57 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 ...
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0answers
45 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 ...
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1answer
43 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 ...
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0answers
32 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 ...
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0answers
34 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 ...
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1answer
22 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 ...
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0answers
15 views

QGIS Import Interlis name of attributs

Why if i import Interlis 1 files to QGIS 2.8.1 / 2.6.1 there is no identification of the attributs names in each tables? The interlis model is correct (I've also tested an ITF-file with the federal ...
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0answers
15 views

QGIS Import Interlis Points problem

When i'm importing a Interlis 1 file (*.itf and *.ili) to QGIS 2.8.1 (or 2.6.1) the polygones are visualized correctly but all the tables containing POINTS (LFP1, Grenzpunkt,...) couldn't be ...
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0answers
29 views

QGIS vector data, graduated symbology (choropleth), discrete class bound values [duplicate]

This doesn't seem to bother anyone else, so maybe it's just me. I'm using QGIS to create a choropleth map of historic property boundaries. Since settlement occurred in pulses, I'd like to use Jenks' ...
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1answer
47 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.
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1answer
60 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 ...
2
votes
1answer
48 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 ...
1
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1answer
37 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 ...
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0answers
21 views

In QGIS what data file formats (etc) can be directly edited and which only viewed?

QGIS allows for opening very many different file formats (SHP,TAB,CSV,Spatialite,...) Some of these are directly editable (SHP, Spatialite, ??) Some of these are only viewable (TAB, CSV, ??) I'd ...
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0answers
15 views

qgis 2.8.1 arcgis filegdb incomplete list in win-version

i am running qgis 2.8.1 (OSGeo4W 64bit-version) on mac (10.10.3) and win (7) ... and was just recently confronted with different behavior of both versions when trying to open (ESRIs) file.gdb. the ...
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32 views

Get min/max value of each band from landsat image?

I am trying to get min/max value of each band from Landsat image with the following code. from osgeo import gdal raster = "raster.tif" # load raster gdalData = gdal.Open(raster) # get number of ...
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1answer
33 views

Create a PLSS quarter-quarter grid using QGIS

Is there a way to create quarter-quarter sections (of the PLSS township/range/section grid) using QGIS? I've already found http://ianbroad.com/creating-quarter-quarter-section-grid-python/ but using ...
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0answers
18 views

Mapyx Quo inaccuracy

I am in the middle of switching from Mapyx Quo to QGIS and have come across a problem. The co-ordinates of points shown both on aerial photos and maps differ by about 10m between Quo and QGIS. I ...
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1answer
30 views

Problem with attribute field in rasterizing tool QGIS

I am trying to rasterize a vector layer using the "rasterize tool" in QGIS... The problem is that there is no "attribute fields" available to choose from (even though they exist!)...
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0answers
23 views

Where to find QGIS geoprocessing results?

Is there a way to access in QGIS 2.6.1 something like the Geoprocessing Results window found in ArcGIS? The History and Log window in QGIS appears to show the geoprocessing results from SAGA, OTB ...
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1answer
31 views

Automatically split KML into point, line and polygon SHPs?

I have a lot of KMLs that include points, lines and polygons together, is there a way to automatically parse them into separate shapefiles (one for point, one for line, one for polygon) in QGIS or ...