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

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17 views

Why Qgis project in firt screen not able to choose?

When I open Qgis the project not able to choose. They are able when I start browser of files and click in director where projects are. Is there options to change it?
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1answer
43 views

Reset Python libraries modified by QGIS on Mac OS X to original versions

I am facing problems in python after installing QGIS. While installing QGIS, it mentioned that it would override my matplotlib and numpy python libraries. I am facing trouble with executing python ...
-2
votes
1answer
26 views

Attribute Table [closed]

I have geological data in shape-file, I do not know which data to open and how from attribute table in QGIS. I need just a map but I do not have an experiences with GIS.
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1answer
39 views

Showing years 1995-2000 in “Select features using expression” in QGIS

I have an attribute table that shows states, years, and other specific things of that state in that year. How do I create an expression (so I can export a shapefile with these selected features) that:...
1
vote
1answer
81 views

QGIS 2.16 GRASS geoalgorithms don't work?

I have problem again almost like version QGIS 2.14. I did not solve the problem. QGIS 2.14 GRASS geoalgorithms don't work? I install C:\MinGW and now QGIS grass geoalgorithms don't work? There is ...
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0answers
21 views

Land cover generation

I am working on a river watershed on QGIS and I need a land cover map. I have a good raster of land use data with 15 m resolution for year 2015, but it covers around the 90 % of the basin. I have ...
0
votes
1answer
45 views

How to build Final Web App from QGIS Web App Builder

I have used Web App Builder plugin from Boundless to build web app,but the app only shows in browser when i Click |Preview|. App created using |Create App| does not open up in browser. It says |Build ...
1
vote
1answer
36 views

How do I get a specific scale/zoom level in the QGIS canvas?

I have a map project with CRS = NAD83 zone 13N. The canvas will zoom to 1:144,447, 1:288,295, 1:577,790, etc. The values in the dropdown, on the other hand are 1:100,000, 1:250,000, 1:500,000, etc. ...
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0answers
23 views

How can I conduct a multi-criteria analysis using a raster on QGIS? [closed]

I have tried this using the vector data but the intersect function but with two fundamental challenges. The conversion vectors to raster comes with a mask that I cannot remove with basic QGIS ...
0
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0answers
37 views

How to perform Network Analysis (Routing) on exported open-layer 3 on website using QGIS? [closed]

I'm just searching for a way to do routing and the shortest path according to tabled analysis data (as on ArcGIS Desktop you can use the tools of network analysis) how to do the same and exporting the ...
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0answers
25 views

issues in table reading from MS Access using ODBC

I want to add two tables from my MS Access db. So I follow the procedure to add ODBC (add vector layer, database, etc.) and it works. I choose the tables that I want to add and hit ok. Qgis adds both ...
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1answer
45 views

How to Format QGIS Field names on Editor Form

I am using PostGIS table in QGIS with custom QGISFieldWidgetFactory. However, I wanted to rename the field names in QGIS Edit Form from say first_name to First Name using Python. Currently, I was able ...
1
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0answers
49 views

polygon/polyline digitizing techniques for geological data

My current work involves extensive digitising of historic geology data - essentially the creation of new polygons and polylines based on overlain raster and vector layers. This is all done manually ...
0
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1answer
21 views

QGIS OpenLayer OSM plugin not matching with my imported GIS information

I have imported GIS data into a new Qgis project for our local city website. The files are shapefiles and inside the prj it shows: PROJCS["NAD_1983_StatePlane_Florida_East_FIPS_0901_Feet",GEOGCS["...
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0answers
27 views

How to create one shapefile between 2000-2010

I have different deforestation shapefiles for Amazon region for each year 2000, 2001, 2002, 2003 etc. until 2010. I want to create a new shapefile that will show the data just between 2000-2010 in ...
0
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1answer
22 views

importing files from grass mapset to QGIS Layer Panel

I am performing an NDVI calculation against 2 sets of rasters. One produced by LANDSAT5 the other by LANDSAT8. r.mapcalc "L8_NDVI = float(L8Band5 - L8Band4) / (L8Band5 + L8Band4)" The L8_NDVI file ...
0
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0answers
33 views

Problems importing .kml to QGIS

I save a coordinate in google earth as a kml file and try to open as a vector layer in QGIS but I can´t see anything. I have already checked the projection but it seems fine. If I try to see the ...
0
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1answer
22 views

segfault on exit when map layer has connection to “layerRemoved”

Here's my sample code that shows the problem - apologies if this is a big load of code but this is as minimal as I can get it: import sys from qgis.core import * from qgis.gui import * from PyQt4....
0
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1answer
29 views

Exporting CSV to shapefile in QGIS? [duplicate]

I have a simple CSV of {lat,lon,text} and I want to export it as a WGS84 Shapefile. How can I achieve this?
3
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0answers
25 views

Rasterize in QGIS using point as centroid (not vertex)

I'm attempting to make the full switch from ArcGIS to QGIS, but there are a few snags I'm hitting along the way, one of which is in the GDAL "Rasterize" function. My process goes like this: I have a ...
0
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0answers
19 views

Can a table (.dbf) be encoded in two different systems?

I am having a *.dbf-file. When I load it into QGIS (delimited text-file) I am having trouble getting all the characters right. Either I load it in encoding=windows-1252 - then the headers will be ...
0
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1answer
47 views

Globe plugin missing - QGIS 2.17.0 master

It seems that the 'Globe' plugin is missing in QGIS 2.17.0 master. Is this a bug or is there something I'm doing wrong:
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1answer
27 views

How to determine when the map has finished rendering

I have written a few functions to compare QGIS performance to MapInfo. Most of them involve doing some analysis then dumping the results on the map, as such the process would be considered 'finished' ...
0
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0answers
14 views

Click to copy Co-ordinates From QGIS

I have a created some point data using CRS ESPG:4326 and added Google basemap from Open-layers plugin. While adding the Google maps imagery i have changed CRS to ESPG:3857 in project properties. ...
1
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3answers
61 views

QGIS CSV import of percentage values

I have a CSV file with four columns. The first column is text, and the succeeding columns are percentages. I have set up a csvt file with "String", "Integer", "Integer", "Integer" When I import the ...
1
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1answer
25 views

C-based implementation of Djikstra's or Fast Marching for QGIS/Python?

I need an algorithm to find least cost paths between points on a discrete grid, allowing for the direction of transport to affect the cost of transport, allowing for different modes of ...
0
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0answers
21 views

Orfeo Toolbox Python scripting problem

I am working with QGIS and the OTB plugin (Orfeo Toolbox). I trained the SVM classifier by "hand" (mouse clicks) and it worked. Then I tried to do it with python scripting, because I have a lot of ...
2
votes
3answers
297 views

QGIS 2.16 “Nødebo” libintl-8.dll missing

I have some trouble to get the QGIS 2.16 32-bit installation working on a 64-bit Windows 7 machine. When the installation is finished and I hit the QGIS Desktop 2.16.0 icon the next error pops up: "...
0
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0answers
43 views

QGIS 2.16 - Missing menu Vector > Research Tools > Vector Grid [duplicate]

I just upgraded to QGIS 2.16 on Xubuntu Ubuntu 14.04.4 and I'm missing the "Research Tools" under the Vector menu. I'm specifically looking for the Vector Grid option. I didn't notice any error ...
0
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0answers
11 views

can't' fix error c2001: new line in constant

I am compiling qgis_core and get the following error. please help me. qgisunittypes.cpp : QString QgsUnitTypes::formatAngle( double angle, int decimals, QgsUnitTypes::AngleUnit unit ) unitLabel = ...
1
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1answer
27 views

How to enable “Label every part of multi-features” with pyQGIS?

Regarding the 'Label every part of multi-features' check box located in the 'Labels // Rendering // Feature Options' layer properties UI... Can this be done with pyQGIS? These two commands enable ...
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0answers
18 views

QGIS 2.14.4 attribute table fields not visible in Statist plugin

I had one point shapefile to which I joined new numerical attributes by a csv text file. I saved it by right clicking and everything works fine, I use it for calculations etc. But when I use the "...
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0answers
21 views

Topological Editing of Two different layers in QGIS

Is there a way to apply topological editing to move vertices between two coincident features that are not the same feature? For example, if I have a crop land polygon coincident with a soil polygon ...
0
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0answers
23 views

QGIS crashing when trying to open PostGIS layer

I'm trying to open a fairly large dataset from a postgres database in QGIS. The table contains over 100 million rows, and it about 60gb in size. When I try to open this table in QGIS (have tried 2.8 ...
0
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1answer
28 views

How to combine two *.qml files in one?

I am making a plugin. I have two qml files for same layer and column. I want it to combine into new qml file and then I will select which one symbol for each value I want. But the problem is, I don't ...
6
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5answers
347 views

Missing Processing Tools in Vector Menu - QGIS 2.16

I'm missing all the usual processing tools in the Vector menu in QGIS 2.16 (eg vector overlay, analysis, etc). They do appear in the processing toolbox but there's no sign of them in the Vector menu. ...
0
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1answer
22 views

Are degree based length/area measures comparable across regions?

I have global shp files of basins (polygons) and rivers (lines). I wish to calculate a measure of stream length per basin area. It should be comparable across world regions, e.g. I wish to compare ...
0
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0answers
14 views

Problem in cell dimension assignment from “save as” in QGIS

I am trying to save one raster in QGIS by changing the cell dimensions. I select 30 x 30 as cell resolution, but then the output raster has a resolution of 29.9985 x 29.9985. How can I assign exactly ...
1
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2answers
66 views

Why can't QGIS recognize the right Layer CRS?

I have a vector layer (shapefile), that I projected with ArcMap 10.4 into UTM33 (EPSG: 25833). If I load this layer in ArcMap, 25833 ist always recognized as the CS of the layer, as expected. But ...
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0answers
41 views

Can I create tiles in Qgis and upload them to Arcgis Online

I have a large shapefile that I want to convert to tiles. Now I need to load those tiles up to Arcgis Online, but I only have Qgis 2.8 desktop--since I work on Linux. I know that Arcgis desktop can ...
1
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1answer
91 views

Finding list of all shapefiles that overlap with single shapefile using QGIS?

I have a list of 34 shapefiles. These shapefiles are range maps for different species. I would like to take 4 of these shapefiles and document a list of those shapefiles (within the 30 shapefiles), ...
3
votes
2answers
52 views

How to rename a QGIS plugin?

I updated a plugin such that now it does more operations than the original title suggests. Is there an easy way to change the name without going through all of the files line by line?
0
votes
1answer
16 views

PyQgis show SVG Symbol on differnet value of specific attribute

I am working on a QGIS plugin. Main feature of this plugin will be changing the icons on a specific layer partly based on a specific attribute (it will be more exciting but you have to start somewhere)...
0
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0answers
25 views

QGIS reads CRS different [duplicate]

I have a data frame with more than 100000 observations. I'm trying to convert this data into a shapefile in R. I give some CRS to data in R but when I open the shapefile in QGIS I see a different CRS. ...
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0answers
14 views

Correct CRS for viewing LandScan data in QGIS?

I think my problem is simple, but I'm still stumped. I'm using QGIS 2.14.3 (having recently switched from Arc). I have downloaded LandScan data for a small area (northern Virginia) and am attempting ...
1
vote
1answer
40 views

Using “right()” and “strpos()” to get rightpart of string for QGIS Field Calculator?

The strpos() function searches from the left side of the string. But instead of always trimming the string, I would like to get the position from the right side. Is there anyway to do this in the ...
4
votes
1answer
53 views

Is it possible to have inheritance in rule based styling on QGIS?

Currently using QGIS to draw some waste water network. Styling depends on the size of pipe (thickness of the line) AND on the status of the pipe (continuous, doted, ...) It's actually fine ...
0
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0answers
29 views

What is the easiest way to write C extensions to Python for use in QGIS?

I would like to write some functions in C to call from the Python console in QGIS. What is the easiest way to do this? Does there exist anything comparable to Matlab's MEX?
0
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0answers
34 views

GeoJson Vector layer in QGIS from a WFS service

It is possible to specify the outputFormat=geojson for a qgis wfs layer? By default, when I add a wfs layer in QGis, is downloaded from geoserver as GML. If I create the layer as: uri = "http://...
0
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0answers
21 views

Remove thumbnail of Qgis from wms,wfs layer

I have created one Qgis map server for serving map as wms or wfs feature. As i am adding the layers in QGIS various thumb nail of Qgis is coming which i donot want them to appear in my map. Same thing ...