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

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1
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1answer
36 views

Shapefile disappeared after changing CRS

I change the coordinate system (CRS) of a point data but it disappeared. I tried zooming to layer but its not visible. I am using QGIS 2.14
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0answers
28 views

How is Reprojection done in QGIS [duplicate]

am using QGIS 2.14.1: How i Reproject a point dataset i have into a different format? eg. wgs84 to local system Am New to QGIS, Switching from ArcGIS to QGIS
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0answers
35 views

Can a GIS do this for me? (KL-1) [closed]

I need to develop a system that will not only map out single family addresses, but identify a contiguous set of them (say 20), produce a map of these, and prevent subsequent runs from reusing them. ...
2
votes
0answers
27 views

Changing QGIS Symbology

I'm trying to change the symbol from 'marker' to 'fill' in layer properties. Is it possible to change that so I can fill the entire property instead of having points for each property?
3
votes
1answer
60 views

Coordinate points not lining up with a preexisting map on QGIS

I asked this question once before, but I did not receive any feedback on solving on the issue and I am still confused as to what I am doing wrong. I found a public domain map of Florida counties on ...
2
votes
2answers
37 views

Open local Raster Tiles in QGIS

I have a local directory with a Raster Tile, downloaded with SAS Planet (I know about the license issues, its just a personal test). In Global Mapper I can load it directly from the directory using: ...
1
vote
0answers
33 views

Is it possible to create a QGIS Windows Installer from my own source on Ubuntu?

I would like to create a standalone Windows installer for QGIS from the modifications I have made locally to my source in Ubuntu. I have done various things like change the splash image and added ...
4
votes
1answer
48 views

Can't delete features from layer using QGIS' Python API

I've only recently started using QGIS and it's Python API. Currently I've loaded two OpenStreetMap datasets. I would like to remove lines with from the second set where the name is already present in ...
1
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0answers
21 views

QGIS 2.14.1 Processing Plug-In does not work anymore (Python error)

I did not change anything and started QGIS 2.14.1 today and was greeted with the following error message. So the Processing tab is missing and I cannot activate it. The error: 2016-04-26T17:58:43 1 ...
2
votes
0answers
18 views

Create different print composers from different layers added to QGIS

I'm using QGIS 2.8.3 with windows 10. I want to know if it's possible and how to create, using python code, from each layer (in the table of content) a print composer to each one of them. Any ...
2
votes
0answers
16 views

Problem with installation of QGIS 2.8 in Mac OS X 10.7

I had followed the installation process of QGIS for installing in my Mac OS X 10.7 (http://www.kyngchaos.com/software/qgis). However, I had a problem in the moment when I open the Qgis, that could ...
2
votes
1answer
13 views

Quartiles from Raster Layer band

I'm building a plugin from QGIS, and I need to extract the values from the quartiles from a band in a raster layer. Does anyone knows how it is done?
4
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0answers
23 views

How can I get a numerical (or value) display for equal intervals in a layer?

I'm looking to classify regions on a map by the amount of light pollution in the area. I have the varied intensities (0 through 60) plotted using a color map, but is there anyway that instead of a ...
4
votes
2answers
111 views

How to get a multiline labeling if it is too long to fit? (QGIS 2.14)

How do I get multiline labels if the text is too large to fit in the length of one line (street). I know "wrap on character", but I need an automatic way to do it. Update: More details After ...
2
votes
0answers
19 views

How do I merge a point attribute table to a polygon attribute table in QGIS or GRASS?

I have a point layer containing the following data: I want the following polygon areas to be added to the point attribute table as all the points occur inside the various features of the polygon ...
2
votes
2answers
56 views

Topography data to elevation raster

In a previous question (convert-xyz-points-to-topography-and-calculate-mean-slope), I asked how to interpolate point elevation data to a raster in order to measure slope. Thus I use the Raster > ...
3
votes
1answer
42 views

Why is the map frame suddenly empty in QGIS-print composer?

Often when working in QGIS print-composer (2.14 and prior), at a certain point the map content disappears and only the empty map frame remains. This happens mostly after closing and re-opening my ...
0
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0answers
14 views

export WMTS tiles as MBTiles with reprojection

I need to export tiles from a WMTS server to the MBTiles format. The server is not public, but I have access to it and permission to export a specific portion of the tiles. The problem I have seems to ...
0
votes
2answers
44 views

How to connect push button in dock widget form?

Following this tutorial as a guide, I created a plugin using the Plugin Builder with the dock widget form. I am now trying to connect a pushButton to a function. The following is a snippet of code: ...
4
votes
1answer
46 views

How to use nested styles?

How can I use nested styles? I found Nathan W.'s post "Improvements to the QGIS rule based rendering" about nested styles, but I do not understand how to use?
2
votes
0answers
36 views

How to use ST_VoronojDiagram for points that are almost aligned?

I am trying to use the spatialite ST_VoronojDiagram function on a table containing four 4 points that are almost aligned: (1.01 2.02, 2.02 3.03, 10.01 10.02, 11.01 11.02). I wrote the following script ...
1
vote
1answer
35 views

Label only selected features with PAL PyQgis using an expression

I'm trying to label only selected features with an expression using PyQgis and the PAL functions, but I don't find any example and the API don't help me a lot (or I don't found it). My Qgis version is ...
4
votes
1answer
71 views

How to get coordinates of label position or make static labels for each feature

How can I get the coordinates of generated labels on Canvas? Or is there a way to make static labels for each feature? I want the labels to not move when the canvas changes scale or moves. My ...
0
votes
0answers
12 views

There is a Run Time error wile using the console.in QGIS

I was writing a post where I have pointed in my code which lines of code "make" QGIS to fail. But as the time as I was writing the post, I tested the code again in the Text Editor of QGIS (2.14). ...
2
votes
0answers
29 views

Basic statistics function on certain attributes stops at 6% on certain layer in QGIS?

I am trying to use the basic statistics function in QGIS on an attribute in a vector shapefile but it reaches 6% and then gets stuck and does not load anymore. It works fine on other layers/other ...
1
vote
1answer
21 views

QGIS 2.14 fails while booting-up

I installed QGIS 2.14 on a Windows7 64bit via the installer. But QGIS can not boot up remaining "Restoring loaded plugins...". Although I re-installed it after I un-installed all of QGIS software ...
2
votes
1answer
92 views

QGIS 2.14 Georeferencer Issue

Am having an issue with the QGIS Georeferencer - I start with a fresh canvas but for some reason, the points always end up shifting a great amount (see screenshot). I've double checked my points, and ...
-1
votes
1answer
40 views

Listing Points Within Polygon for Hadoop? [closed]

I am very familiar with a point in polygon analysis but instead of counting how many points are within each polygon. Does anyone know how to list the points within the polygon and add a field that ...
1
vote
0answers
29 views

Problem loading from MySQL in QGIS 2.10 on Mac

I cannot load a vector layer from MySQL in QGIS 2.10 (Pisa) on a Mac. If I goto Layer -> Add Layer -> Add Vector Layer -> Database I do not see MySQL in the drop down. I found this link. I did not ...
5
votes
1answer
84 views

How does one style the border to match the fill in QGIS?

In the past I have just manually matched the color of the border to the color of the fill, but this can be time consuming. I am wondering, is there any way to have the program automatically match ...
3
votes
0answers
30 views

Missed "processing' panel in QGIS 2.12.2 Lyon

I have missing 'processing' panel in my QGIS Lyon version. It happened once some time ago, so I re-installed program then. And now I have the same situation - I've cleaned my QGIS registry key and ...
4
votes
2answers
64 views

How to place only one symbol on the centroid of a multipart polygon?

I am using QGIS version 2.14.1 (Essen). I would like to place symbols on the centroids of my data. The problem is that some of my data has multi-part polygons, which means it places the symbol at the ...
5
votes
2answers
139 views

Are there any multipolygons in my shapefile?

In QGIS 2.x, is there a simple way to determine if a polygons layer contains multipolygon geometries and if yes: which are these features?
1
vote
1answer
14 views

QGIS, Calculate networks first, diameters second

I need to get the following task done: First, various points (stored in a shapefile, identified by a common attribute) need to be put into relation with each other (see graphical scheme, steps 1 and ...
1
vote
0answers
20 views

QGIS Composer keep reference after reloading layers

I have written a plugin which loads a bunch of geojson data via REST for a specific region, which is selected by the user, afterwards generates some vector grids over the extend and styles all the ...
1
vote
1answer
65 views

Writing result of PyQGIS to shapefile

I try to perform some zonal statistics on a shape- and rasterfile and write the output to a completely new shapefile! import sys # where is the module ...
2
votes
2answers
28 views

How to read the saved extent of the QgsProject?

I am trying to access the extent of QgsProject. How can i do that with PyQGIS?
0
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0answers
18 views

Geoserver WMS can connect in QGIS/ArcGIS desktop, but not in OpenLayer3

I have a WMS service publish in my machine, I can conect this service with my Public IP (in other pc) and private IP (local Network) in Arcgis Desktop or Qgis, but I can't view it in openLayer 3 or ...
2
votes
1answer
19 views

Qgis select distinct by default on Print Composer

I have a filter on Print Composer that selects "id_mov" and shows figures one by one into the map. This "id_mov" is not unique so different id can have the same "id_mov". Qgis select distinct by ...
1
vote
0answers
8 views

Set minimum scale on QGis Print composer (atlas)

I have a template ready to be printed on Print composer tool of Qgis. I need to fix a minimum scale while figures are represented one by one (1:10000) I would like to combine the scale tool controled ...
0
votes
0answers
43 views

Qgis 2.14. How to export color of polygon?

I use Qgis 2.14. I have some problem with export .dgn to shp. Qgis appropriates random colors to my polygons after export. Somebody knows how i can export original color of my Autocad dgn?
2
votes
1answer
50 views

Filter spatialite layer with 'not equal' in QGIS

I tried to filter my spatialite layer with the "SPECIES" IS NOT NULL OR "SPECIES" != 'Corvus corax' expression, but the result contains the lines where "FAJ" field is 'Corvus corax' (the NULL value ...
0
votes
1answer
14 views

Polygons from PostGIS table won't highligt in QGIS

QGIS 2.14.1 / PostGIS 2.2.1 I have a table with polygons and a view on this table in PostGIS. When I select the features from the view in QGIS with Identify Features, the objects highlight on the ...
1
vote
3answers
62 views

Save a WMS layer on your Hard Drive via QGIS?

Well, here's another question. I'm working on a set of WMS data right now and i wanted to know if you can save it on a Hard drive. I do know that you can save the current view as a georeferenced Tif, ...
4
votes
2answers
58 views

Options for Aerials QGIS 2.10

I'm looking for options to add aerials to my QGIS Project. The OpenLayers plugin doesn't work (it says it's only available for versions 2.0 - 2.2), so I'm stuck moving from ArcMap to QGIS. Is there ...
3
votes
1answer
41 views

Use Interpolation extension from python

I would like to use interpolate point data to create a raster in QGIS. I am doing batch analysis so I would like to use a python script. I found this question : ...
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votes
0answers
14 views

QGIS problem with Google Maps? [duplicate]

In QGIS 2.14.0, When I use a google maps, then I am going to make a map, the image loose quality, or characters. That's a problem and it only happens with google maps.
1
vote
1answer
24 views

CRS and Spatial join problem

I try to match two layers. First one is point-type with cities in Europe. Second one is grid layer (polygon) with elevation value. What I want to achieve is to to join the "Z" value from grid layer to ...
4
votes
3answers
76 views

QGIS reduce density of points displayed

I'm working with a considerable amount of points and I would like to be able to display only part of them since they overlap a lot and are cumbersome to display. Most of them form a trajectory so ...
2
votes
1answer
42 views

How to hide more than one QGIS attribute field at a time?

Using QGIS 2.14.1, I use the Layer Properties > Fields > Edit Widget to hide the display of an attribute in the attribute table, as shown in this screenshot: Is it possible to hide multiple ...