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

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25 views

how to calculate area of a polygon in a shape file in qgis [duplicate]

I want to calculate areas of different polygons in qgis in tabular format.
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43 views

qgis 2.8.1 - processing gdal 1.11.2 error (mac, 10.10.2)

i've just recently installed qgis 2.8.1 on my mac. including all relevant packages from kyngchaos - i.e. GDAL Complete 1.11 framework package, Matplotlib Python module, numpy - and updated python to ...
4
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1answer
104 views

open project made on OSX lion on a windows computer with QGIS

I made a project in my personal computer (mac OS Xlion) and now I would like to modify it on my work computer (windows 7), Is it possible?
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1answer
31 views

How to replace VectorWriter with QgsVectorFileWriter?

Within QGIS 2.8.1 I found within the Processing Toolbox a script called "Points on crossing lines" which should exactly as it is named. Unfortunately it needs processing.core.VectorWriter which I ...
3
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1answer
70 views

Is it possible to add a raster file as layer from an URL?

I have several geoTIFFs stored on a server that I can access through http. I would like to add them as raster layers analogous to adding a local raster file through the "Add Raster Layer" button, but ...
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80 views

Half-SOLVED : compilation of QGIS 2.8 against GRASS 7 from source with centos6.5

Not very clear how to set variables with ccmake in the QGIS project 2.8.1, but now I learn that library paths need to be complete, i.e. : Not : -DSPATIALITE_LIBRARY:string=/usr/local/lib But : ...
2
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0answers
30 views

QGIS 2.8 PrintComposer, no coordinates shown

I tested under MacOS 10.10.3 and 10.9.5 now: In the QGIS v2.8 Print Composer I don´t get coordinates shown when I want to create a map sheet and activate "Draw coordinates". I can do all settings ...
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1answer
33 views

Order by column is sorting String like though it is an Integer column

The question is very easy. The usual sorting of an Integer column is really bad. I need it like 1,2,3...11,12 and so on. But currently it's more like 1,10,11...2,20... Here a picture Is there an ...
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2answers
56 views

Clip tool does not work Qgis [closed]

Is there any particular reason why I cannot clip in QGIS (2.8)? I have a Vectorgrid which I created based on another shape - namely a country. Now I want to clip the vectorgrid to the size of the ...
3
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1answer
44 views

Need to Quickly Add Multiple Layers From Multiple Folders To QGIS Project

I have downloaded several imagery Zip files (content of each is jp2, jpg, jpw, xml, htm, and .dbf, .prj, .sbn, .sbx, .shp, .shx) and would like to quickly add this imagery to my working project in ...
1
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1answer
48 views

Convert from ESRI Shapefile and/or Raster Formats to LAS (Preferably free)

I am looking for a solution to convert either from ESRI shapefile format to LAS or from a common raster format to LAS. I have access to: ArcGIS 10.2 for Desktop (arcinfo with spatial analyst and 3d ...
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1answer
27 views

QGIS plugin: Problems importing resources (resources_rc) file - plugin doasn't load - PATH problems?

I'm building qgis plugin and I can't find solution for this error. File "/usr/lib/python2.7/dist-packages/qgis/utils.py", line 478, in _import mod = _builtin_import(name, globals, locals, ...
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0answers
17 views

QGIS plugin : connect to polygonselect Maptool signals

Working on a new plugin I am trying to connect a custom function to the mouse right-clic signal while using the polygon selecting maptool. I have activated the maptool through : def run(self): ...
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1answer
51 views

How to change the attribute length of an existing field afterwards

I already have about 100 values in a field in QGIS. I set it to 50 characters because I was thinking that would be enough. But that was wrong. I need more space in the column. But there is no way to ...
1
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1answer
30 views

Downloading data sets during installation

I can successfully install QGIS 2.8.1 on a Windows 7 machine but I get an error when downloading the Carlina, South Dakota and Alska data sets. The error message is http/1.0 504 Gateway Timeout. Looks ...
1
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1answer
45 views

QGis 2.8.1 Series of maps from different layers

I have many layers in one QGis-Projekt based on the same .shp-File (Community borders) with different fields classified and displayed in each layer (Mean Income, Mean Age, Average Houshold Size ...). ...
2
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1answer
45 views

Is there Data Loader for QGIS or Spatialite?

Is there a tool that works like the data loader of ArcGIS for QGIS (or via Spatialite )? To integrate data in a database or a shapefile without having the same structure (and the tool allows to ...
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1answer
46 views

unable to print correctly QGIS maps [duplicate]

I already ask how to print a map without screwing the "sync" between my map and the Openlayers background. I have tried 2.6.0 and 2.8.1 versions getting only deep frustration. I have used the scale ...
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1answer
44 views

Re-projecting point data using ArcMap

I've created a point data layer in QGIS using a .png image as a template. Of course the .png had no projection, and when creating the new shapefile I chose the WGS_84 coordinate system. Now, I need ...
2
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0answers
47 views

Install QGIS Server and Web Client under Ubuntu 14.04

I tried to install QGIS Server and QGIS Web Client on my Ubuntu machine by following this tutorial http://www.aboutgis.ro/blog/wp-content/uploads/2013/04/qgis_desk_web_server_client_tutorial.pdf. At ...
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1answer
49 views

How to add a lat/lon grid to a map using azimuthal projection?

I have a north azimuthal projection, equal areas. I want to create a map from it (in QGIS) and display a grid on it for better orientation. Thats how it looks like: Why doe my degrees have so ...
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2answers
23 views

Merging raster data in QGIS using wildcards

I have a problem merging raster data sets in QGIS, and I have searched various forums, but have not found a solution yet. An "ordinary" merge, for example merging the raster files ...
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2answers
73 views

QGIS 2.8 Wien - dll pyodbc not found

I just installed QGIS Wien 2.8.1, first the OSGEO4W Installer and later the standalone installer (32bits) and when I write import pyodbc on the Python console I get a message that the dll was not ...
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0answers
59 views

Need to connect ArcSDE dataset using QGIS Desktop and Oracle database

I am working in GIS domain using ESRI technology. I want to use QGIS desktop to access ArcSDE dataset from a local machine. I have already installed Oracle Client 10g and QGIS Desktop 2.8.1 through ...
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1answer
29 views

How do I create an atlas with multiple maps for each coverage layer with QGIS?

I am doing a NSW transport map that would like to segregate using Local Government Areas (LGAs). However, I specified that each map should be in the same scale, hence I would like to have many ...
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1answer
30 views

QGIS georeferencer: Thin Plate Spline (TPS) residual

1) Is anyone able to explain in simple manner what does mean error exactly mean? I use metric values, so suppose 3.64109 is expression of meters and "e" is mathematical constant: ...
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1answer
73 views

How to get the average of a column?

So I have a shapefile with 160k elements. It is in UTM and I calculated the area (should be meters, right?). What I need now is the average size of each of my polygons. Meaning, summing up a column ...
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0answers
33 views

QGIS, GRASS and WINDOWS 8

Good morning, I'm using QGIS 2.8.1 (Wien) on Windows 8 x64 bit. When I'm trying to lunch the GRASS plugin (6.4.3), Windows shows me the error g.mapset.exe has stop working, then after some times, ...
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0answers
22 views

Can I define a style for one layer, taking into account a defined relationship with another? (QGIS 2.8)

I have two sets of data. A large set of lines with a line_ref field, and a small data-only (no geometry) table with a matching line_ref field (let's say for argument's sake that the data-only table ...
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2answers
60 views

Scalebar gives error in measurement in Qgis: Different measurements of distance on OSM tiles and GoogleEarth

I've created a map of Bordeaux using the QGIS map compositor by following this procedure: Used the OSM plugin to display an OSM map and zoomed to Bordeaux Used the print composer to create a map of ...
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0answers
21 views

C# GIS Bing Maps

I'm developing an application in C# and I want to show my data on map like Bing maps, so what is the best the best way to do that. I have seen SharpMap but I could not load Bing map to it. please ...
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1answer
79 views

QGIS in Windows Embedded Handheld 6.5?

Does QGIS work in Windows Embedded Handheld 6.5? I am planning to buy an outdoor mapping device, but I'm not sure if this OS supports QGIS. Thank you!
2
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1answer
59 views

World map different projection

I want to display something on a world map. I have these shapefiles http://thematicmapping.org/downloads/world_borders.php I want my map to look something like this: or I am using QGis. Is ...
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0answers
21 views

Using googe places api search results in desktop QGIS

I came across another post that asked this question Formatting Google Places API GeoJSON and Import to QGIS? and I am wondering if it is possible/allowed, and if anyone has done this and what is ...
1
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1answer
37 views

Reduce number of points, keeping most recent data within a given distance

I have a HUGE dataset of points that were collected along a route. The data may change daily, and the most recent data is the most important. What I would like to do is take only 1 point from a given ...
3
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1answer
52 views

Neither “Photo2Shape”, nor “Geotag and import photos” works

System: Windows 7 QGIS 2.6 Brighton and QGIS 2.8 Wien Photo2Shape 0.5.0 EXIFread 2.0.1 Geotag and import photos 1.1.0 EXIFtool 9.90 Problem: EXIFtool and EXIFread are installed correctly. Both ...
2
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1answer
112 views

QGIS 2.8.1 OpenFileGDB compatibility with ESRI FileGDB?

I am trying to view an ESRI FileGDB in QGIS 2.8.1. Do I have to use "add vector layer" - "directory" - "OpenFileGDB" in order to open and view the data? Is there a way to specifically open the ESRI ...
2
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3answers
50 views

How do I use the field-calculator in QGIS to return the name of a country from a different shapefile?

I have a shapefile that consists of a list of archaeological sites with the x and y coordinates. I have an Natural Earth shapefile for the countries of world. I was wondering how I go about ...
1
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1answer
33 views

Save view or map in QGIS

Is there a way to save the current shapefile, raster, etc selections in QGIS and then bring them up all at once later? For example, I find myself re-creating maps over and over because I need ...
1
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1answer
59 views

CAD line drawing to GIS polygons pt II

I'm a (reasonably) proficient GIS user (mostly QGIS, but some Arc GIS) who has been thrown the conundrum of converting/importing CAD urban planning drawings (2D drawings produce in AutoCAD 2014) to ...
2
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1answer
54 views

Geometry in QGIS 2.6

This might be a beginners question, but I could not find an answer on the internet. I drew a couple of polygons in a vector layer and I am trying to get some basic geometric information into my ...
2
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1answer
43 views

How can I open a jpg format with QGIS 2.8?

I'm having some difficulties opening the jpg format at QGIS 2.8. It opens, but nothing appears. Thanks for your help!
1
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1answer
59 views

Creating polygons layer from point layer with conveks buffer

I have a point layer of >750000 points representing dwellings with district heating. Now, I want to create polygons for every n of points with a distance of n meters to the next point. I have a ...
2
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0answers
94 views

QGIS server 2.6.1 upgrade to 2.8.1 error

I plan on upgrading QGIS server from 2.6.1 to 2.8.1. At the time of 2.6.1 is used, however, to 2.8.1 found the map service can not be used, the emergence of internal server error 500. ...
2
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1answer
27 views

Loading Raster using QGIS API in Windows

I am trying to develop a C++ application using QGIS. I have to load a tif file and show it. First I wrote an app similar to samples on the internet. It works on Linux, but it does not work on ...
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1answer
57 views

QGIS 2.8 Convert a vector to a raster layer

When I change a vector layer to raster using raster button->converse->Vector rasterization in QGIS2.8. I get only a black picture. Why is that so and how can I convert a vector layer to a raster ...
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1answer
18 views

How to turn a vectorgraph into raster correctly?

In QGIS2.8 version, I added several points in a point vectorgraph. When using the grid - > Conversion - > rasterized vector , The results turn out into a black figure. How to turn a vectorgraph into ...
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0answers
29 views

Wrong Scale Bar in Map Composer

I am attempting to add a scale bar into QGIS Map Composer for a single layer showing a map of Jervis Bay, NSW Australia. I have changed both the project and layer CRS to 'MGA56 (EPSG:28356)' and have ...
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1answer
162 views

Openlayers not rendering on QGIS 2.8

I uninstalled QGIS and removed all files on the computer with QGIS in them. I then reinstalled version 2.8. I still get the same problem that google streetmaps does not display. When I try one of the ...
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1answer
39 views

Qgis raster calculator not giving output

I want to calculate some result using QgisRasterCalculator and using the code mentioned below.Problem is i am not getting any output raster also if i use this formula in raster calculator it gives ...