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

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0
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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
96 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
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1answer
41 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
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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
89 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
31 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
66 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
21 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
66 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
29 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
19 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
22 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
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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 ...
2
votes
1answer
57 views

How to export color of polygon from Autocad into QGIS?

I use Qgis 2.14. I have some problem with export .dgn to shp from Autocad. Qgis appropriates random colors to my polygons after export. Somebody knows how i can export original color of my Autocad ...
2
votes
1answer
51 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
64 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
60 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
42 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 : ...
-1
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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
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1answer
25 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 ...
1
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0answers
5 views

Mapping shapefile attributes to raw data [duplicate]

I have raw address data stored in a sql server database (2012) which comprises address, city/suburb, state and generally country (Australia). I would like to take this address data and following ...
2
votes
1answer
62 views

How do you create a buffer for a specific feature in QGIS?

Fairly competent ArcGIS user here, very new to QGIS. What I am trying to do is create a one-mile buffer around the highlighted parcel in QGIS 2.14 (from a .shp). Seemed straightforward enough: ...
3
votes
1answer
33 views

Get the full list of commons

In QGIS I've loaded the shape file "province" in which attribute table contains 242 fields (the municipalities of this province) and also two other files downloaded from openstreetmap about hotels ...
4
votes
0answers
50 views

Issues updating field values programmatically for particular field data type on 64bit Windows computer using QGIS 2.8.7

I have an issue with a plugin for QGIS 2.8 I'm developing when using it on a Windows 64bit machine (as opposed to 32bit). I am trying to update values in a particular field in my plugin, and the ...
3
votes
0answers
32 views

Translating ArcGIS field calculator python expressions in to QGIS field calculator python expression?

I'm transitioning to QGIS from ArcGIS. I'm having trouble getting my python field calculator expressions to work in the QGIS advanced python field calculator. Here is a screenshot of the working ...
2
votes
2answers
48 views

Convert a vector into a csv file [duplicate]

Is it possible to use QGIS to convert a vector that contains points/polygons into a csv file and, if yes, in which way?
3
votes
2answers
75 views

How to calculate the relative share of an area of a circle that has a slope >15% in Germany

I need to calculate the share of buildable land for the 15 major german cities within a 50 kilometer radius of the city center. Part 1 of the definition buildable is that the area must have a slope ...
1
vote
1answer
36 views

Extract results from zonal statistics [on hold]

I am trying to calculate mean slope in given polygons. I first interpolate my (x,y,z) data to create a raster file and use the terrain analysis tool to calculate slope. Then I use the zonal ...
0
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0answers
28 views

How to use the “geometry generator” to intersect geometries with an entire layer in QGIS?

In the "geometry generator" style in QGIS, it's possible to define an intersection for a specific geometry of an other layer like this: intersection($geometry, geometry(get_feature( ...
1
vote
1answer
50 views

Why does joining all layers in a group not work?

I am attempting to re-join all layers within a group to another layer ("Main.shp") outside of this group. The idea is for users to change values in one of the group's layers. As these layers are ...
1
vote
1answer
24 views

Create lines between two points, given an ID

I have a spatialite point table (p1) with an additonal column (pid) that relates each point to a point in another point table (p0) in the same database. I want to create a line between every pair of ...
1
vote
1answer
45 views

QGIS 2.14 save pdf with google maps

I have an shp file in CRS 2100. I use the open layers plugin and inserted goggle satellite as background. It changes the project's CRS into 3857(OTF). So, in the composer manager, when I try to save ...
3
votes
1answer
37 views

displaying attribute table on top

I would like to pin (fix) the opened attribute table to the QGIS window or display the table on top. The attribute table is opening as another window (and it is possible to open the same attribute ...
1
vote
1answer
38 views

How to design a flood with water elevation on a specific point?

Actually I have to know the flooding area caused by a rise of the water level due to the implementation of a dam. So I would like to know if there is an extension or any tool in QGIS or GRASS which ...
2
votes
2answers
42 views

Sum line lengths by category

Is there any chance to calculate line lengths by category. To be precise, I have 4 road categories (state, county, local and uncategorized) and want to calculate them all within one poligone. So ...
2
votes
1answer
43 views

QGIS: intersect on a single shape file

I am using QGIS version 2.14.1 (Essen). I'm trying to do some spatial analysis, including an intersect between the same shape file. Basically I have a shape file with the geometries of all the events ...
3
votes
0answers
22 views

Create an optimised path between nodes avoiding polygons entities

I have nodes as a shapefile representing seaports. I have the linear cost of shipping for every pair of seaport (specific shipping cost to go from one node to another node). I want to find a way to ...
1
vote
0answers
30 views

Finding point on line closest to other point: unexpected results [closed]

I'm basically trying to do the same thing as outlined here: Finding the point closest to a point on a near feature However, the results I'm getting with the queries suggested in the accepted answer ...
1
vote
0answers
18 views

How to write postgres source in virtual layer in Qgis 2.1x

In Qgis 2.14, I am trying to create a connection with my postgres database using virtual layer. But in the virtual layer window, how should I write the parameters in source field ? I can't find any ...
6
votes
1answer
92 views

Is it possible to create a round map frame in QGIS Map Composer to create circumpolar maps?

Does anybody know if it's possible to create a round map frame in QGIS Map Composer to create circumpolar maps?
-1
votes
2answers
45 views

Merge layers with different geometry

I need to merge two different layers but they don't have the same geometry, in particular one contains points and one is a polygon (province). Is it possible to do so by converting them to the same ...
1
vote
1answer
36 views

Two inner polygons touching and covered by two different outer polygons

I need to create a topology where 1 and 2 touch but don't overlap, a and b touch but don't overlap, and 1 covers a and 2 covers b. Is it possible to achieve this? I've tried various snapping ...
3
votes
1answer
49 views

How can I work with time in QGIS

I would like to make a map displaying how several building uses have changed during the last decades. For example, this building was built in the year 1483 as a monastery, in 1880 it turned into a ...