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

learn more… | top users | synonyms (1)

0
votes
0answers
13 views

Problem rasterizing

I am trying to rasterize a shapefile using the "rasterize" tool in qgis. The problem is that the resulting raster doesn't seem to rasterize correctly... The teal and purple lines show water flow, ...
0
votes
1answer
6 views

Grid and Graticule in QGIS Print Composer in QGIS 2.8

I'd like to add a grid in the print composer. The problem is there is no visible option like it was in previous version. I mean I'm looking for an option "Show grid?" like in the picture below. I ...
0
votes
0answers
21 views

Is it possible to change extension name TIFW to TFW in QGIS?

In QGIS from the "project-->Save as image" dropdown it is possible to save the current map canvas as Tiff. A world file is also automatically exported. Nice! BUT, I use the TIFF+TIFW in another ...
1
vote
0answers
22 views

Shapefile doesn't fit in CartoDB basemap

When I import some shapefiles in CartoDB they don't fit properly at street level, as you can see in the screenshot. In this case, the shp was generated in QGis with CRS EPSG:29193 - SAD69. I have ...
1
vote
1answer
15 views

How to change rule-based Layer Styles all at once in QGIS?

Let's say I have a layer with buildings which is only shown when the scale is higher than 1:10000. When the scale is higher than 5000, I want them to show its function color (retail, residential, ...) ...
1
vote
0answers
9 views

QGIS WMS Server line style

I have the same problem reported here (QGIS WMS Server), i have one project created in Qgis desktop (tried windows and ubuntu flavors), then exported WMS into Qgis server (ubuntu). All line layers are ...
2
votes
1answer
46 views

Can QGIS place diagrams in map legend?

I have this map and I want to put these red circles in the legend of the map according to this form: Is there a way to do that in QGIS? Thanks
1
vote
1answer
23 views

QGIS: digitized object disappear when filling in attributes

When digitizing, for example a point, the attribute window opens for you to fill in the pre-defined columns/information. But no point is shown in the map while you do this in QGIS 2.6. It was shown in ...
1
vote
2answers
20 views

Spatial Join Error Python in QGIS

I got this error message when I tried to do spatial join. An error has occured while executing Python code : Traceback (most recent call last): File ...
0
votes
0answers
22 views

Land use Models and Open source software software for land use Simulation

I need to do a land-use future prediction so I have classified my study area into 4 classes: Urban Barren Surface water bodies Vegetation Now I have to find the feature land-use prediction. My ...
1
vote
0answers
11 views

QGIS print composer and label with svg background error

I have a problem with labels in QGIS. I'm using a background svg for some labels (street numbers). In QGIS, it's all ok but when I use the composer there is a bug (I suppose), because I see some ...
0
votes
1answer
22 views

How to make transparent WMS vector background in QGIS?

I have a WMS vector layer added to QGIS desktop. But the background is not transparent - it is white. How to change that? When I add this WMS to ArcGIS - all is just fine. Here is the WMS link: ...
1
vote
0answers
40 views

keep .JPG georeferencing from ArcGIS to QGIS

I have the same issue explained in this post: How to keep georeferencing from ArcGIS when importing raster into QGIS? But my problem is with .jpg files. I have georeferenced with ArcGIS 10.2.2 many ...
0
votes
0answers
15 views

qgis raster calculator unexpected type long

I am trying to do a very simple multiplication of a raster using the QGIS raster calculator but repeatedly receive the following error: Traceback (most recent call last): File ...
1
vote
0answers
25 views

How can I change Java version for QGIS?

I have a custom made plugin for QGIS, which uses Java JDK (running on Win7x64). If the JAR file is run through command prompt, everything works great, but when the same command is used in plugin, it ...
0
votes
1answer
33 views

How to export point geomtery geojson from QGIS?

I want export geojson (from shapefile), for leaflet project. But QGIS 2.6 exported geojson is multipoint geometry(leaflet doesn't read that), so its way to export point geometry geojson from QGIS?
3
votes
0answers
29 views

How to make a virtual field function use the same Ellipsoid settings as the normal field calculator?

I have a new shapefile layer in CRS 3857, in a project that has the same CRS. Under project properties, the measure tool is on ellipsoid WGS 84. When i use the field calculator to create a new field ...
2
votes
1answer
25 views

QGIS reprojecting .ecw file in EPSG:23032

I opened the .ecw file with qgis but I found that the ortophoto is 340 mt northern and 150 mt eastern the topographic map. How can I move the ecw?
1
vote
0answers
38 views

Problems coloring features of file geodatabase in QGIS

I managed to open a file geodatabase (.gdb) in QGIS. The extensions of my data are correctly shown and the attribute table shows all values correctly. However, when I double-click on the layer to ...
1
vote
0answers
10 views

QGIS GEarthView plugin ReactorAlreadyInstalledError

I've been battling to get this really handy plugin working for some time. When I try installing it from plugin manager, I get the following error: "This plugin is broken 'module' object has no ...
2
votes
1answer
22 views

Grass NVIZ has no output in QGIS 2.8.1 ubuntu 14.04

I am trying to use the Grass7 NVIZ algorithm from the QGIS 2.8.1 toolbox, on ubuntu 14.04. I have enabled Grass7 in the QGIS processing preferences. I have compiled Grass7 from source, and Grass ...
1
vote
0answers
24 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
votes
2answers
56 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 ...
1
vote
1answer
39 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. ...
1
vote
2answers
20 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 ...
0
votes
0answers
20 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
0
votes
1answer
26 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++.
-1
votes
0answers
50 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 ...
0
votes
0answers
34 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 ...
1
vote
2answers
58 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 ...
1
vote
1answer
18 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 ...
1
vote
0answers
16 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 ...
0
votes
0answers
12 views

Saving files in QGIS in yosemite 10.10.3 [on hold]

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. ...
0
votes
1answer
21 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 ...
0
votes
0answers
18 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 ...
-3
votes
0answers
42 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.
5
votes
2answers
85 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 ...
0
votes
1answer
40 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
1answer
29 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
56 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 ...
1
vote
3answers
24 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 ...
0
votes
0answers
24 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 ...
1
vote
0answers
36 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
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 ...
-1
votes
0answers
36 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 ...
1
vote
1answer
23 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
1answer
86 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
1answer
44 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
votes
1answer
22 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 ...
0
votes
0answers
12 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 ...