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

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22 views

How to change the raster format using QGIS translate?

I tried to change a raster format from .tiff to .asc using Qgis's 'translate'. As a result, I get 3 files: a PRJ, XML and a file without extension just a plain file... What could it be happening? I ...
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2answers
57 views

Is it possible to save qgs file as older version?

I just got installed the version 2.6 of QGIS (OSGeo4W) on Windows 7. I am exploring the new capabilities and the compatibility of our tools with this new version, however, i have to keep on working on ...
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0answers
31 views

QGIS Points are not retaining original attributes

I am trying to map birth and death locations for several hundred people in the US and Europe (for a total of 532 points in one layer). Twice now I have discovered that somewhere during this process ...
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0answers
17 views

oracle VectorLayer without geometry - How to get attributes?

I have a prolem to iterating over a oracle VectorLayer without geometry in QGIS 2.6. self.uri = QgsDataSourceURI() self.uri.setConnection("localhost", "port", "xe", "name", "password") ...
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1answer
55 views

Why do pdf/image exports fail with OpenLayers Bing layers?

When I try to export a print composition it generates a 0kb file. Is not possible to open this file. It happened the same with export as image option. The print composition model is coming from a ...
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2answers
85 views

IdentifyFeature() use via PyQGIS?

Intent is to have two variables (QgsVectorLayer and feature.id() within said layer) as input for the Identify feature map tool in Qgis (2.6). Wondering if a feature can be selected programmatically ...
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0answers
30 views

how to use a database's table data in QGIS [closed]

I have already loaded a MySQL database as a layer, one of the tables contains data that are coordinates of some places, how to plot these data on a map(for example google maps)?
3
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1answer
39 views

How to deal with data-defined SVG paths in a project used on Windows and Linux?

I have a project QGIS used in both Linux and Windows, synchronizing the working directory with dropbox. The project uses relative paths, so that the directory structure is observed only from the ...
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0answers
19 views

How to display row and column of a selected pixel in QGIS?

In QGIS, I can use the identify tool to get the pixel value and the coordinate for a selected pixel, I also have a coordinate capture tool to display the selected pixel in another coordinate system. ...
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1answer
29 views

Export KML from GeoJSON in QGIS and coordinates change?

I'm very new in this area. I have a geojson vector layer file, with coordinates like { "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 487677.2993499999866, 112018.26101 ] } }, ...
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0answers
19 views

How to include 3D break lines in QGIS raster interpolation

I wish to add a break line to an interpolation of a set of survey points to simulate an elevated ridge in the survey area. Using QGIS 2.6 on Windows 7. I have created a polyline shapefile with a ...
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13 views

How to convert Dekstop QGIS project as QGIS Web Client using python?

Assuming there are many Desktop project files .qgs.Is there a way using python to enable File>Project Properties>OWS Server>WMS/WFS/WCS in a batch mode ?
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0answers
58 views

Import vtk file in grass gis

last summer I made the relief of a cave, and at this time I returned with Therion software. This survey is in 3d and I can save it in the formats .Lox, .3d, vtk. I would like to import it in grass or ...
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3answers
62 views

How to use PyQGIS spatial index efficiently?

The PyQGIS Cookbook explains how to set up the spatial index but it only explains half of its usage: create spatial index — the following code creates an empty index index = QgsSpatialIndex() ...
3
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2answers
51 views

How to add today's date into an attribute table using QGIS Processing modeler?

I am looking for a way to use the Processing modeler to add a date field to an output dataset in QGIS 2.6.1 I have tried using the field calculator algorithm without success. (Also the advanced ...
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0answers
25 views

How to match UTM squares between Excel and Shapefile?

I have an excel file with locations displayed in UTM 10kmx10km squares. I also have a shapefile with those same UTM squares and their coordinates, however I cannot seem to figure how to project the ...
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29 views

QGIS Crash: Enter Credentials

just wondering if anyone has come up against this issue...in the office QGIS will come up with an 'Enter Credentials' box with 'Error: Too many clients already'. When you enter your username and ...
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0answers
10 views

QGIS street labelling when rotating in composer

When labeling streets in a QGISmap everything's OK, no label are upside-down. But I need to rotate at 180° in the composer. Labels of lines don't flip, so they are upside-down! I tried to "show ...
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0answers
36 views

QGIS join by location not returning for features

I have eight contours/features in one shapefile (contour.shp) that i want to find the number of population within each contour, this is in another shp. I am using join attributes by location to do ...
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1answer
72 views

How to add fields to shapefile from standalone script?

When I run the following script via OSGEO4W64 Shell, I receive the following error when trying to run the qgis:fieldcalculator algorithm: 'NoneType' object has no attribute 'mapCanvas' I read ...
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1answer
19 views

Efficiently working with converting vrt rasters to greyscale in QGIS?

I have large raster tile sets working well in QGIS (Ordnance Survey UK data). Sometimes I want to grey/fade these to make my data clearer to see. Attempting to access properties on QGIS for the VRT ...
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1answer
60 views

Advice on Map Maker Pro versus QGIS [closed]

I am an ecologist in the process of trying to decide whether to purchase Map Maker Pro or utilize the free open-source QGIS platform. Most of our needs are associated with basic map making. I am a ...
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2answers
22 views

Why won't my csv file imported as a vector layer have attribute table headers?

I have a .csv file that has unique identifiers that I'd like to join with some legislative district shapefiles in QGIS. I've done this before, and the joins all worked fine -- and technically it still ...
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0answers
28 views

Files generated with QGIS are invisibles for my system (windows 8.1) How can I Solve this?

My use of QGIS is basic but very important in my job. My final product usually is a Cartographic map (PNG or BMP image). Since the last updated (QGIS 2.6.1 Brighton) I have problems with every file ...
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1answer
15 views

Eliminating pixels of a Merged image

I need to change the value of pixels that where created in an image as a result of merging 2 rasters, this new pixels have a value of 0. The problem is, that there are pixels with 0 in the original ...
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1answer
81 views

QGIS Linear Referencing

I'm not sure how to ask this. Essentially; I work for a survey company doing gas lines GIS. We use QGIS. We create hand drawn sketches of pipelines containing all sorts of information including: ...
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23 views

Easy Custom labeling

When I move labels using the Easy Custom labeling plugin, there is a visible line between the original placing and the new one, even when I make the layer uneditable. Any ideas how to prevent this?
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1answer
34 views

How to Set SRID in Spatialite

How do you update the SRID in a SpatiaLite table? I am using the QspatiaLite plugin or the SpatiaLite_Gui program to send this SQL to the table: UPDATE myTable SET geom = SETSRID(geom,26910) ...but ...
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0answers
24 views

`Execute SQL` in Processing QGIS 2.6

I made a small model with Processing in QGIS 2.6. The final layer should be the result of a SQL query. Now, in the Execute SQL dialog window I can add the query: select name, max(ele) as ele, geom ...
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0answers
20 views

Create buffer based on polyline without line end caps and without dissolving the created polygons in QGis

I have a projected line layer (Shapefile) in QGIS. For every line segment I want to create a polygon without line end caps. The resulting polygone should not be dissolved to a single one. I tried ...
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0answers
13 views

QGIS 2.4 Join Attributes Table tool does not recognize non spatial data to execute

I'm using the graphical modeler in QGIS 2.4 to automate some processes and certain tools are basicly necessaries to get to the point. The "Join attibrutes table" tool, despite it's basic, can help us ...
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0answers
9 views

QGIS Export section from raster to AutoCAD

QGIS Windows 7 I have a raster which displays the flood depth over my site. What i would like to do export to AutoCAD an outline (maybe as a polygon or line) of the sections of the raster which are ...
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3answers
45 views

Can't use Raster Calculator with two different rasters

So, I have several maps like this one: And with the proximity tool and a coastline shapefile I made this output, representing the distance to shoreline: Now, I want to combine both using the ...
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1answer
54 views

Convert polygon to point with QGIS [duplicate]

I work with QGIS and I tried to convert polygon into point. I need points all over the perimeter of the polygon. I saw several answers like: Problems converting polygon to point but I didn't see an ...
2
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3answers
69 views

Which tool/referecence for adress geocoding?

I have to geocode several corporate sites (a big excel file), near to Paris (FRANCE). I would like to geocode this file based on the addresses. Could you tell me the best tool for this task ...
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0answers
20 views

Error after executing hex grid script in QGIS 2.6 for Mac

I hope some of you might help me in solving this problem: I'm trying to load a script with QGIS, hex grid from layers bound, with a population shape file (popp.shp in egis sample data folder). After ...
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1answer
16 views

Connect OpenLayers3 Client with QGIS Server

at the moment I am developing a map editor on a web. After researching at the internet about map clients, I decided to use OpenLayers3 client because it is very simple an has all the tools i need ...
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0answers
36 views

Python error opening plugin manager in Quantum GIS [duplicate]

I just attempted to update my version of QGIS from something like 2.2.0 (can't remember exactly what it used to be) to 2.6.0 and now encounter an error - copied below - when I try to open the Plugin ...
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0answers
45 views

Filemaker interface with QGIS

I have created a map of features on an archaeological site. The artifact inventory is in FileMaker Pro 12. Rather than creating a CSV file and using that as the attribute table, I would rather, if ...
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2answers
96 views

Problems with plugin/installer manager in QGIS 2.6.1 Debian

An error has occured while executing Python code: Traceback (most recent call last): File "/usr/share/qgis/python/pyplugin_installer/installer_data.py", line 460, in xmlDownloaded if ...
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0answers
35 views

How to convert .qgs to .mxd using standalone QGIS and Python?

How to convert .qgs to .mxd using standalone QGIS and Python ?
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0answers
14 views

Open a NetCDF file with multiple time step on QGIS (using Python console)

How to load a NetCDF-file into QGIS using Python? explains well how to load a NetCDF with PyQgis. However, it did not help me to choose among all the available time steps. Is there a way to import a ...
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0answers
15 views

Join a table to a pre-joined field in QGIS

I'm trying to join a .csv (X) to a .shp layer (Y), but X and Y don't share an ID field. Another .csv, Z, has TWO ID fields--one shared with X and one shared with Y. In any other language, I'd first ...
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0answers
10 views

Editing the configuration of a join in QGIS

Is there any way to edit the conditions of an existing join in QGIS? I have a .csv joined to a (polygon) .shp layer; because I only needed a few fields from the .csv, I only joined those I needed. ...
2
votes
1answer
59 views

QGIS Python script for creating project file

Is there a way to create QGIS project file(.qgs) using only Python script outside QGIS Python console.I am trying to publish a map using QGIS Web Client using python. For this, I am trying to do below ...
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1answer
50 views

What am I not getting about JPEG 2000 coordinate systems?

I hate to ask this here because I suspect it is a very basic question, but after several days of scouring the web, I need some help with understanding JPEG 2000 imagery and coordinate systems. What ...
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0answers
28 views

How to count unique lines intersecting with polygons?

Like u can see on the attached picture i did an intersection with a Raster (purple squares) and the red lines. What i need to know is the count of joins each line has for each square. What makes ...
3
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1answer
24 views

How to rotate labels by the same angle as the map in the composer?

Does someone know if it is possible to make the labels rotate the same angle as the map in the composer? I'm trying using the expression attribute( $map, rotation) in the data defining placement, but ...
1
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1answer
25 views

Error summing 2 different rasters?

I was trying to sum two different rasters and the final outcome is an error (image attached below)? The main goal is to sum the values of each pixel in those rasters (both raster files have the same ...
1
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1answer
28 views

How to invoke a script in the currently running QGIS instance from the command line?

From the Windows Command Prompt (or Batchfile) I want to find the running QGIS instance with an open project. Afterwards a script (eg. zoom to something) should be automatically started. I've tried ...