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

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0
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3 views

How to create a rule-based gradient using an expression

I am mapping points with values from 0-100 and want to display these using a gradient color scheme. However I also want to specify the breaks as regular intervals along this range. For a gradient QGIS ...
1
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0answers
5 views

How to update raster color ramp with new min/max values using PyQGIS?

I'm trying to update a single band psuedo color renderer with new min/max values from the python console. All the code samples i have been able to find deal with constructing a renderer from scratch, ...
2
votes
5answers
33 views

How to create different size of bubbles with different colors?

I have a set of points with fields like 'TYPE','SIZE','SALES VOLUME',what i would like to do in QGIS is: Apply different color code by 'TYPE', Apply graduated size of bubble circles based on 'SIZE' ...
1
vote
1answer
19 views

Pulling a cvs file from a website into QGIS with the ability to automatically refresh.

I am attempting to pull a cvs file from a website that is updated daily. I would like to have a process that can automatically perform the process and save daily as a new layer. The cvs file is ...
4
votes
1answer
151 views

Pulling CSV file directly from website into QGIS?

I want to be able to automatically update my csv files in a QGIS project. My organization has an online database that can easily export csv files. These csv files are constantly updated with new ...
0
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0answers
5 views

Add save/commit button to custom feature from

I would like to add a save/commit button to a custom QGIS feature from. This is very helpful when there is a linked table dispayed on the same form - the link will work only once the main table has ...
0
votes
0answers
10 views

How to fill holes/missing values in XYZ data / a DEM with QGIS?

I have equidistant XYZ point (text) data that I used to create a point grid. However, it's not perfect - there are some holes. I then created a DSM raster from it, which obviously has the holes too. ...
1
vote
1answer
9 views

Transform from Lambert Azimuthal “old” to ETRS89_LAEA

I'm currently struggling to convert a small raster dataset with Lambert Azimuthal "old" projection : +proj=laea +lat_0=48 +lon_0=9 +x_0=0 +y_0=0 +R=6378388 +units=m to the projection EPSG:3035 ...
0
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0answers
67 views

QGIS web client - ERROR generating pdf

If I push the print Button at the toolbar, i will get the menu which works fine. But then i want to print the map the pdf doesn't generate. That's why i look into firebug and i get following ...
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0answers
6 views

QGIS Crashing when Adding MSSQL Spatial Layer [on hold]

Using QGIS I have connected to a database from MSSQL with no issues. When I import one feature I can specify the coordinate system and edit attributes. However, if I wish to add a second feature and ...
8
votes
3answers
14k views

How to export Polygons to CSV with coordinates?

I am very new to QGIS, so please bear with me. I have a ".shp" file, which is contains a set of boundaries for suburbs of Australia. I opened it to QGIS and I would like to export it into a CSV file ...
0
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1answer
25 views

Can I mimic the “open” action in QGIS with python and manipulate the field content used for the action?

I am using QGIS actions (type: "open") to link ECM searches to objects on the map. The basic syntax is very simple: protocol://searchterm1=[%"field1"%]&searchterm2=[%"field2"%] However, some ...
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0answers
7 views

Image is Not Showing in QGIS:- in the plugin information pane (the right pane where the details of the plugin is displayed on selecting the plugin)

I created a QGIS plugin with Plugin Builder. Even though the icon set in the metadata.txt is displayed in the Plugin Manager list (left to the plugin name in the installed plugin list), it is not ...
0
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0answers
16 views

Showing the composition in QGIS [on hold]

I´m currently using QGIS 2.8.1 and have create a plugin with the pluginbuilder. I´m trying to create a composed layout and want to show the layoutcomposer to the user at the end. I´ve done the ...
0
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3answers
10k views

How to publish my map on the web? [closed]

I want to publish my map is created in QGIS 1.7.4 version on to the web.Can u pls suggest me how to publish the map with proper documentaion and screen shots if possible?
0
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0answers
18 views

How to process a big number of raster outputs?

I am new to python and QGIS. I'm trying to take some simple operations (e.g. count, average) over a big number of raster maps from a python script. I'm using the "r.series" algorithm (from processing) ...
1
vote
2answers
20 views

How to link polygon features in one layer to polygon features in another, using largest overlap in QGIS or GRASS

I have two polygon layers: the first one contains small land lots (green in the image), the second one contains large zones (the purple line in the image attached separates 2 such zones). I want to ...
0
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0answers
4 views

Load and View Layers with Specific Symbology in QGIS form

I want to create a form to access my desired layers with defined symbology through some push Buttons in QGIS. when you click a button, specific layer with a defined symbology will be shown, Could you ...
0
votes
2answers
32 views

How to stylize KML layers for Google Maps?

I am using QGIS 2.0 to convert my shapefiles into KML layers. The purpose of converting my shapefiles into KML layers is to bypass the restriction imposed by Google Fusion Maps, which only allows ...
14
votes
4answers
1k views

Rubber sheeting in GRASS or QGIS

We are in the process of getting our property boundaries corrected and a side effect of this is that we need to move any assets that have been drawn relative to the property boundaries, so they are ...
1
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0answers
28 views

Point to raster: QGIS vs ArcMap

I have an equidistant point grid (0.5m) and created a raster from it in QGIS and ArcMap, with different results: QGIS: Raster -> Conversion -> Rasterize Result: raster, with points in the top left ...
0
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0answers
18 views

Distance Matrix analysis for QGIS 2.8 using one layer

I'm using QGIS 2.8's Distance Matrix tool to find distances to nearest neighboring points on a single layer. I've followed roughly the instructions on this site and adapted it to my needs. However, ...
3
votes
2answers
418 views

WMS layers don't draw in QGIS or ArcMap but do in OpenLayers

WMS Map was published by myself in AutoDesk Infrastructure Map Server 2013. I can connect and load detials (properties / metadata) in QGIS Browser, ArcCatelog. I can load the wms into QGIS desktop and ...
1
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2answers
18 views

What is “Simplify tolerance” in QGIS's Simplify geometries tool?

I am trying to use QGIS 2.8 to simplify vector geometries. But I do not understand the significance of the Simplify tolerance value in the Simplify geometries tool. The documentation does not ...
0
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0answers
15 views

How to set qgis custom forms size?

I'm facing an issue close to the one posted there : Stop custom attribute form from resizing in Qgis with QGIS 2.8.2. I've got two layers with custom forms. Layer 1 form is much bigger than layer 2 ...
3
votes
1answer
50 views

Local Ortho projection to Proj4

We are trying to use proj4 to project a local coordinate system to EPSG4326. We believe we have most of the string created correctly in QGIS and as follows; +proj=ortho +datum=WGS84 ...
1
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0answers
8 views

Default item on legend for QGIS

when I make a legend in QGIS, everything shows up how it should except for one item. The item is just a pale brown color that says "default". I can't find this item in any of my layers and have no ...
3
votes
1answer
5k views

How to add points to a point vector layer - QGIS

I have a point layer with multiple data points in QGIS, but I want to add some extra data points to it and adjust some info that we missed because the ground was wet and we needed to go around it. I ...
1
vote
1answer
35 views

Create new attribute ranking polygons by size in QGIS

I'd like to create a new field in the attribute table which gives the rank of the polygon by size. For example, the polygon of the largest size would be rank 1 and the smallest rank N. I was hoping ...
0
votes
0answers
9 views

How to run the QGIS viewshed plugin from the console?

I want to run the viewshed plugin from the console/ in a script in QGIS. Do you know if this is possible?
1
vote
1answer
39 views

How to convert multiple vector layers to georeferenced rasters using QGIS?

I have Openstreetmap background loaded in QGIS - currently from Spatialite, but no problem to get shapefiles. I need to convert the loaded map to one big raster or could also by more smaller ones, ...
2
votes
0answers
15 views

Output formats for QGIS Heatmap plugin not appearing in drop-drown in Ubuntu

I've been trying to use the heatmap plugin on QGIS (2.8.2) on Ubuntu(14.04) but the drop down for the output formats doesn't get populated. Selecting the drop-down allows me to press OK on the plugin ...
1
vote
1answer
28 views

How to write a vector layer as tab delimited txt file using PyQGIS?

I'm using the following QGIS 2.8 Python code to save results to a txt file QgsVectorFileWriter.writeAsVectorFormat(inputLayer, "D:/dstest/my_csv", "CP1250", None, "CSV",True) I would like to be ...
1
vote
0answers
122 views

Problems installing QGIS 2.8 Wien on Windows 7

Having trouble upgrading from QGIS 1.8, which ran just fine, to QGIS 2.8. I'm running 64-bit Windows 7. After uninstalling QGIS 1.8, I've been trying for several days to install the 32-bit version of ...
1
vote
0answers
33 views

How to pull data from multiple databases via Qt .ui form?

Using a single .ui form and wthin QGIS, can I show multiple records from another table that is associated with a single polygon? Table 1 contains planning applications ref Table 2 contains multiple ...
2
votes
2answers
582 views

Looking for QGIS 2.4 C++ Hello World example?

In the project I'm working on (C/C++/Qt application), we are trying to integrate QGIS (latest version desirable, 2.4 for the moment). But there is very little information in the web on how to use QGIS ...
0
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0answers
6 views

Plugin c++ - QGIS [duplicate]

I'd like to know how can i create extension in c++ by using QtCreator, for QGis 2.8 ? Thank you for helping me.
1
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0answers
19 views

How do I add packages to Standalone Qgis's Python?

I have installed the QGIS 2.8 on my Windows 8.1 system, using the Standalone Installer. I now wish to install the VectorBender plugin. The docs for this plugin say, that I need to install matplotlib ...
3
votes
1answer
204 views

How to achieve better Dissolve results?

I applied the Vector>Geoverarbeitungswerkzeuge>Auflösen (Dissolve) on a zoning plan (see picture zoning plan). I used the attribute village name as the dissolving criteria. The resulting geometry for ...
5
votes
3answers
175 views

How to get QGIS to play with pandas (Windows)?

has anybody been successful getting pandas to work with QGIS's Python installation, on Windows? I've used the OSGeo4W installer to install QGIS2.2, which comes with Python 2.7 and Numpy 1.5.1. Any ...
5
votes
1answer
187 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 ...
0
votes
0answers
18 views

Different colors of rasters after loading back to QGIS

I am experiencing this issue longer time but sometimes it is really annoying so I would like to solve it. When I save an image from QGIS - no matter when using Project/Save as image or using Export ...
1
vote
0answers
39 views

Masking Labeles in the Compositor in QGIS 2.8.1

I am looking for a way to remove/mask out Labels that are under a composer Element (Overview Map), which I moved in front of my main map. Is there no way to do this? I tried the mask add-on, but it ...
0
votes
0answers
31 views

Vector to Raster using GDAL (gdal.RasterizeLayer) : Error in Output Raster(generating output raster with NAN values)

For rasterizing a vector layer, I have tried gdal.RasterizeLayer method for converting vector(shapefile) to raster(tiff). But its giving raster output with NAN values(complete black image). I need ...
1
vote
2answers
43 views

How to map a building to only one grid which contain more than half of its area using qgis?

I have a shapefile of a city map and I have created vector grid as polygons. After intersecting the two shapefiles, a building will map to all the grids it overlaps. However, if I just want it to ...
1
vote
1answer
132 views

How to select and zoom in features from a QGIS Python Plugin

I'm very new to Python. I'm trying to find a way to select and zoom to the features from a QGIS layer. I've created a plugin and built a custom form. I have 3 values from the form which I need to ...
2
votes
2answers
1k views

Qgis - Couldn't load plugin 'processing' - name 'QsciLexerCustom' is not defined - Manjaro

UPDATED I receive the following error when I start Qgis: Couldn't load plugin 'processing' from ['/usr/share/qgis/python', '/home/v/.qgis2/python', '/home/v/.qgis2/python/plugins', ...
0
votes
2answers
214 views

Conflicts while installing postgresql9.3-postgis2.1,QGIS and gdal-bin

I want to use postgresql9.3-postgis2.1 and gdal-bin parallel . I have refer instruction here for installing postgresql-9.3 on ubuntu 12.04. I have install qgis from here While installing gdal-bin it ...
0
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0answers
27 views

Collecting data [on hold]

I'm using qgis, i'd like to know if there's an app that i can install on a tablet for collecting data, and after by connecting the tablet on my computer in order to upload the data ?
2
votes
1answer
179 views

qgis missing menu bar ver 1.8.0-lisboa on ubuntu linux

QGIS emits the following warnings when starting, and fails to display the main menu bar. $ qgis --nocustomization Warning: loading of qgis translation failed [/usr/share/qgis/i18n//qgis_en_US] ...