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

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Where to find the “contours from points” model in QGIS 2.6?

I can't find the example model "contours from points" in QGIS 2.6. Is there another tool for creating contours from points, besides the QGIS Contour plugin?
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202 views

QGIS graticule coordinates in print composer starting from 0?

I am not sure how to explain the problem correctly as my English isn't as great as it should be - but let me try anyway. I just tried to create an extremely simple map made of one layer loaded as ...
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324 views

Project from Datum Nad27 to WGS84

This should be simple: have a shapefile in UTM z16 DatumNad27 and want to transform it to Datum WGS84 latlon I am using Qgis 2.6 Sorry I am going to clarify, with the steps taken: 1- XY data of a ...
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1answer
456 views

Is it possible to have auto-updating area fields?

I'm using QGIS 2.4.0 and I've noticed some problems with the derived area and the $area field. Firstly, I have a polygon which is a filled ring, inside another polygon. The derived area, and therefore ...
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236 views

Qgis Python console print statements not working

I have a small problem with the Python console in Qgis. I am working through some introductory tutorials on Python scripting for Qgis. I have a script that loads layers, then queries the canvas for ...
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112 views

how to know distance of a point to a shape in a certain orientated direction?

I have a point (in the middle of the sea) and I have to measure the distance from this point to the land. No big deal, I can use the measure tool. But what if I have to know exactly the distance ...
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1answer
334 views

Remove Leading Zeros with QGIS Field Calculator

I'd like to take this attribute value: "MAP_PAR_ID": "0160011000", and populate a new field with "16-11". This works: concat(substr("MAP_PAR_ID",0,3), '-', substr("MAP_PAR_ID",5,3)) but i need to ...
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1answer
239 views

How to export a postgis table to a pbf file?

I need a tool like osm2po or osm2pgsql but that does the opposite thing, convert a postgis table to a pbf file. I think qgis can do this but I can't find that option.
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418 views

Could not open/read USGS raster file

I could not open/read the following .img file. The document below says it is a raster file. http://edc2.usgs.gov/1KM/land_sea_mask.php I tried to open it using many ways such as Q-Gis software, and ...
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741 views

QGIS's raster calculator— running as a batch process?

I have a series of raster files (150 or so) that I need to multiply by a baseline raster. Unfortunately, the series of rasters have a different cell size (30m×30m i.e. .00027777778 degrees &...
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1answer
166 views

How to use pre-generated Tiles

i have just created Tiles with Qtiles on Qgis, but how can put these folders (tile .png) on Geoserver or Mapserver? is it possible? I am trying to put the folder in C:\Program Files (x86)\GeoServer ...
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116 views

Spatial join with snapping

is there a tool in QGIS which is able to perform a spatial join with the possibility of define a snapping radius? For better understanding: I have 2 point shapes with attributes I need to join by ...
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2answers
175 views

Interpolate dxf polyline vertex elevation from DTM?

I am working on several autocad polylines (with several vertices...) that have the exact N,E coords but now I would like to add the elevation data for every polyline's vertices from a dtm. I thought ...
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1answer
511 views

Running and debugging PyQGIS scripts in PyCharm Community Edition?

I am working with creating plugins for QGIS 2.4.0 (Chugiak). I am curious to know how I can write the codes, and debug them in the environment I am comfortable in, i.e. PyCharm Community Edition 3.4.1....
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1answer
642 views

Convert From Northing/Eastings to Latitude/Longitude with QGIS

How can I convert a file with the projection below (NAD83) to one with Latitude and Longitude? The import file is a SHP file and I would like to export back out a SHP file. +proj=tmerc +lat_0=0 +...
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1answer
80 views

How to load territorial maps on QGIS from web?

Is it possible to use QGIS like Google Earth? I need to draw simple shapes on territorial maps. I would like to do that without using multiple files for each part of the Earth. I use QGIS 1.8, but I ...
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1answer
324 views

SQLite instead of gdb

I use ArcGIS and Qgis and I want to have common protocol and format of my files. To use a separate file for each program is not the best way, I don’t want to make a mess of data. I would ask if SQLite ...
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1answer
554 views

How to transfer layer data from OpenLayers to PostGIS database or QGIS?

Supposing I have a created some layers in OpenLayers containing only Geometry Points, how do I transfer my data to a postGIS database? Is there a way to turn pure javascript/openlayers to a table in ...
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1answer
2k views

Using the Live tracking with internal GPS?

We have some Panasonic ToughPads (FZ-G1) with a GPS a module built in. I know where it is and can locate in it in COM 3 and it connects, registers a signal, shows satellite locations, but refuses to ...
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1answer
42 views

Adding shadedreliefarchive imagery to QGIS

I'm trying to add some relief imagery that is found at shadedreliefarchive.com Specifically, I'm trying to add the SEAsia one found here. I've tried making a custom CRS to match the details found on ...
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1answer
456 views

Suitability Analysis using QGIS? [closed]

I want to do an overlay analysis to find most suitable locations to live in an area. My criteria are road network, water lines, hospital locations, and schools. My steps are: Convert all layers to ...
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1answer
616 views

Difference between ETRS89 / ETRS-TM32 and ETRS89 / UTM zone 32N

In QGIS I can choose among other things between "ETRS89 / ETRS-TM32" and "ETRS89 / UTM zone 32N". In my test project both projections displayed the layers at the very same place. So, where is the ...
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1answer
378 views

How to use the % Modulo operator to select points for labeling?

I have a shape file with point numbers for individual ID's. I would like to select point numbers divisible by a number, and if the remainder is 0 then I would like to label that point. I have tried ...
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1answer
155 views

Error importing raster into GRASS plugin in QGIS

I am trying to import a tiff raster file into GRASS however every time I do this the below error message comes up. I am using a custom CRS so I have tried changing it back to the default CRS but still ...
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1answer
120 views

How to simplify a multiline geometry in QGIS?

I'm trying to simplify my shapefile, which uses a lot of vertices to represent curvatures, by using the Generalizer plugin. But no matter what threshold I use for Douglas algorithm, it still includes ...
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1answer
858 views

Extracting raster values with polylines in QGIS

I have a polyline shapefile that represent a road an a raster grid with slope values. Is it possible to interpolate the shape file and the grid to have the average slope of the road? I know that I can ...
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1answer
63 views

How to get a dynamic picklist in QGIS

Has someone an idea how to get dynamic picklist widgets in the object window! Eg. You choose a country in a picklist so the next picklist only shows cities in that country! I know that you could ...
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1answer
970 views

QGIS SLD in GeoServer

I rendert a beautiful with QGIS based on OSM data. Now I want to publish it via GeoServer. I am new to GeoServer but as far as I it does not accept SLD files created by QGIS. My GeoServer cannot ...
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1answer
830 views

Getting Leaflet and image popup from QGIS export working?

I am a novice in using leaflet, I exported my map layers from QGIS to a working Leaflet map. I am trying to modify the popup to use the attribute so as to get an image popup. i am however stuck as i ...
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2answers
126 views

Where/how to find ortophotos

I am very new to Geographic Information Systems. I have a very basic inquery; How do I get hold of the newest ortophoto of South Africa to use as a background map for my GPS data? I'm using QGIS but I ...
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1answer
590 views

How to create QGIS theme map?

I need to make theme map using diagrams like in MapInfo, can I do it in QGIS? Or can I create a surface using attributes?
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74 views

Syntax to add attributes in a line in the Expression String Builder

I have several columns with certain values, here's an example: | Apple | Banana| Orange | Pear | Expected result | 1 | 1 | 1 | 1 | red | 1 | 2 | 2 | 1 ...
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2answers
354 views

Export long lat from polyline as csv file in QGIS

I want to draw a line in QGIS and then, export the long-lat of each point into a Comma Separated Value (csv) file. I tried doing this by creating a new shapefile layer and then using the Add Feature ...
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1answer
2k views

qgis polygonize error 4 “file does not exist in the file system”

When I try to convert a raster DEM (in asc or geotif format) to polygons I get the error below. ERROR 4: `Y:/GIS/oversvmmelser/tmp/out.tif' does not exist in the file system, and is not recognised ...
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2answers
171 views

Creating counties in QGIS

I have a raster map (a photocopy I took from an Atlas), and a vector map of the UK. The raster map shows pre-1890 Scottish county borders. I have geocoded the map so that the raster borders overlap ...
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1answer
546 views

Box cropping shapefile based on particular latitude and longitude using QGIS? [duplicate]

I have a shapefile and I need to crop/clip it based on a rectangle of particular latitude and longitude using QGIS. If it is possible, how do I do that?
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1answer
189 views

How to scale with radius attribute

new user of QGIS. I would like to style vector data based on an attribute (radius). The actual unit is in nautical miles. I don't want to use size-scale field or buffer to style the point rather I ...
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1answer
72 views

Performing transformation from GHANA GRID to WGS 84 using QGIS?

I have a shapefile which was referenced using Ghana's grid system. I imported it to QGIS and specified WGS 84 but the coordinate bar still displays the Ghana grid values in the coordinate bar. Is ...
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1answer
962 views

QGIS GRASS Missing Dependancy

I want to perform a view shed analysis in QGIS using GRASS 7 r.viewshed. When I double click on r.viewshed in GRASS GIS 7 commands in the processing toolbox of QGIS I get the following message: ...
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2answers
459 views

QGIS Convert Polygon M to polygon

I have been using Argis 10.1 and been able to convert polygon m to polygon shapefiles. I would like to do this with QGIS but I am having difficulty in finding the correct tool to do so. Please Help
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1answer
93 views

How to test for multiple map items in Composer using python?

I am building a QGIS plugin and I need to check for multiple maps items in Composer that works on all platforms. Currently I am getting the first map in the composition using the code below, but ...
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1answer
99 views

How to automatically connect point [closed]

I have to draw all the rows connecting the 2 edges with a line. It's not so hard to it manually, but it takes a lot of time. Is there a way to connect the two edges of the rows automatically? For ...
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2answers
81 views

How to calculate regrowth area?

Thanks to Best Landsat-5 TM band combination for detecting fire scars I am able to calculate burnt area in an absolute way (Normalized Burn Ratio). Does a ratio or delta operation exist to calculate ...
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1answer
291 views

Does the experimental QGIS2leaf plugin not work on mac OS?

I am trying to get the experimental QGIS2leaf (Leaflet web maps) plugin to work on my macbook air (2012, Mavericks OS), but when I open the outputted index.html file, no interactive image shows up in ...
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1answer
276 views

How to increase the resolution of a 3D image in QGIS GRASS NVIZ

I'm trying to display 3D data in NVIZ within QGIS, but the result appears very low resolution in comparison to the same data in ArcScene. Any ideas as to how to improve the quality would be greatly ...
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1answer
215 views

How to batch-process attribute tables in QGIS (or GRASS)?

I'm using GRASS 6.4.3 in Linuxmint 16. I have a bash script for GRASS which I use to process almost 300 raster files. The script first imports some raster files (r.in.gdal), then does some ...
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1answer
222 views

Are there reference manual pages anywhere for QGIS built-in “buffer” and plugin “points2one”?

Perhaps I am missing some quick pop-up help mechanism, but as a relative newcomer to QGIS (having cut my teeth on ArcGIS 10.1), I am struggling to find reference manuals (i.e. explanations of all ...
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2answers
275 views

Relationship of QGIS to its sister programs?

I'v e been using QGIS 2.4 for a number of months now and we are using it a bit at work. I noted that when I did the initial install a number of new icons appeared on my desktop namely MSys QGIS ...
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1k views

How to export a high-res world map image?

I'm trying to get some (very) large world map images (think 10k x 10k pixels etc), but can't seem to do it with QGIS, and would appreciate any help. Manually adding smaller images to a larger one ...
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1answer
68 views

Layers not displaying in the correct order

I have a shapefile that is in my Layer tree above an aerial imagery layer. Yet, the map covers the shapefile with the aerial imagery. Any ideas how to fix this?