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

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3
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1answer
104 views

Export DXF Issue in QGIS?

I got the shapefiles in QGIS and transformed them to UTM NAD83 from WGS84, then tried to create a DXF of it so I could use it as an overlay in fieldgenius software for a topographic survey we're ...
1
vote
2answers
448 views

QGIS (2.6.1) Processing Toolbox InitGui error after changing /Users folder on Mac OSX

Using: Mac OSX 10.9.4 QGIS 2.6.1 I had previously installed QGIS and had everything running fine. My home directory was /Users/rowanbado, but for another application I had to add an ...
3
votes
0answers
446 views

Why are OGR (MySQL / PostGIS) connections extremely slow in QGIS 2.0 - 2.8 (when compared to QGIS 1.8)?

In our project we have been using QGIS 1.8 Lisboa with a MySQL database placed on a server accessed via local network since two years. Everything is working fine and quick. The vector layers can be ...
1
vote
0answers
43 views

Network Analysis for Pickup and Dropoff

I have a bit of a problem that I need help with. I am looking at a set of lat/long with a time stamp for the desired pickup or drop-off for passengers. There are multiple pick-ups and drop-offs within ...
2
votes
3answers
353 views

Is it possible to set up a local QGIS Plugin repository?

I've developed a couple of custom QGIS Plugins for use by our office. I can't post them to the official QGIS Plugins repository as they reference/utilize sensitive data on our own servers. For ...
0
votes
0answers
36 views

QGIS How to multiply (repeat n times) a point by field [duplicate]

I have a point layer in QGIS that has a field named "Amount" that stores an integer value for every point in the layer. I want to create N points in the exact place of the feature that has N as ...
1
vote
1answer
186 views

print composer and atlas feature on large dataset

this question could be very complicated, so I'll try to be as clear as I can. I have a polygon (hundreds of cells) that has a quite rich attribute table (more than 30 fields). Each field contains ...
0
votes
2answers
61 views

Is there a list of free application modules (or “Fachschalen”, in German) for QGIS somewhere?

I'm looking for application modules (in the form of plugins) that cover sets of related tasks like asset management, in a basic UI. A simple use case example: a water gauge (point feature with a 1:n ...
1
vote
1answer
222 views

Run C++ standalone application in debug mode

I write simple C++ standalone application using QGIS. It works and render vector layers from PostgeSQL database. #define CORE_EXPORT __declspec(dllimport) #define GUI_EXPORT __declspec(dllimport) #...
8
votes
4answers
15k views

How to export attribute table to Excel from QGIS?

I have seen all the questions for this question, and I try all the answer like copy paste, csv (in fact this I don't know where to find) but none of all is not the right answer. Can anyone help me?
1
vote
1answer
327 views

How to enable the snapping for a layer with the tolerance value with python programming

I have a vector polygon and vector polyline layer. I want to enable the snapping for both the layer with tolerance value? How can i do that using python programming. I have tried this code but getting ...
2
votes
1answer
109 views

Create a grid with statistics of the merged shapefiles in QGIS

I operate with QGIS. I have to split the shape files of the buildings and the roads of a city into a grid of 500x500m per square and into each square I have to obtain the total free area, the total ...
0
votes
0answers
60 views

How to project the geographic grid in a shapefile in QGIS

Is it possible to automatically project the geographic grid (View -> Decorations -> Grid) into a shapefile layer in QGIS?
2
votes
1answer
711 views

How to save the Map Canvas as PNG with transparent background programmatically?

I wrote a script to create a big number of heatmaps for a given scenario. I would like to save the result of every heatmap as a png image. I have figuered it out doing it with simple Map Rendering but ...
1
vote
0answers
157 views

QGIS 2.6 SAGA Processing Algorithm, “Add grid values to shapes”, produces NULL Values

I'm using QGIS 2.6 Brighton on Windows with SAGA 2.0.8 installed using OSGeo4W. I have the same versions installed on OSX as well which is not having this problem. On Windows, I'm trying to extract ...
0
votes
0answers
58 views

Getting coordinates from random directions

This is an odd question, but was wanting to know if there was a way to get coordinates from random directions. I have about 2000 directions in a spreadsheet column. There is name and a few other ...
0
votes
0answers
82 views

Line length for line files

Using QGIS, Brighton 2.6. Trying to calculate line-lengths for linear features (roads, trails, fenceline) and used this post (How to find line length in QGIS while editing?) and the links associated ...
1
vote
1answer
56 views

How to display symbols on a Raster in QGIS?

I have a raster file in which each cell has a numeric code which indicates that the cell is directed towards one of its eight neighbours. I am using QGIS to display each of the eight possible codes ...
0
votes
1answer
29 views

Projection issues with merging files. [duplicate]

New QGIS user, 2.6 Brighton. My project CRS is default to Nad83ft / N.Carolina (US). I loaded various polygon and line (provided to me) that have various CRS's but they still show correctly in place ...
2
votes
1answer
224 views

QGIS gets stuck when running script to automatically refresh layer [closed]

I have a QGIS layer that represents a set of links and nodes to show the streets of a city and the traffic speeds on each street. I've been trying to write a script so that if I change the speeds in ...
0
votes
1answer
105 views

Why is the display of QgsMessageBar delayed?

When a function is called - a file is tested for existence. This checksum pushes a messageBar() object for both circumstances (True/False), yet the actual bar does not display in MapCanvas until ...
1
vote
1answer
148 views

How to exclude a certain attribute from being added to the Processing script output layer?

I have a working script to split a layer by field attributes and save the single features as files: ##[User scripts]=group ##input=vector ##class_field=field input ##output=output file from qgis....
1
vote
1answer
55 views

How to remove a parcel from a larger area?

New QGIS user here. I'm trying to clip a large (2000-ac) property boundary with a smaller (500+/-) acre property. Assuming the larger boundary is the input layer and smaller is the clip layer, my ...
0
votes
0answers
482 views

Couldn't load plugin processing in QGIS: Access is denied for R

Couldn't load processing plugin due to flowing error. Any help? thanks. Couldn't load plugin processing due an error when calling its initGui() method Traceback (most recent call last): File "C:/...
1
vote
0answers
62 views

Hydrological triangle (geoscience) with QGIS 2.6.1

I want to interpolate ( TIN-Interpolation) between variable points (the best within a triangle) WITHOUT producing new shapefiles (or csv data file). So what I have now is an interpolation of all ...
0
votes
0answers
77 views

Is there any way to create user login for single project in QGIS?

Is there any way to create user login for single project in QGIS? I want to track changes on database when users update features. I know that I can do this on database level but is there way to do ...
1
vote
1answer
316 views

How to calculate distance to polygon edge to compute building setbacks?

I'm trying to calculate building setbacks using building footprint data. A building setback is the distance between a building and the edge of the lot line. (You can distinguish this further—garage ...
2
votes
1answer
2k views

Can QGIS or GRASS convert layer files to shapefiles?

Should I be downloading QGIS or GRASS? I want the program with the most features. Most importantly, I have a lot of .lyr files. Can either of these softwares convert to shp and if so, how can I do ...
0
votes
1answer
154 views

Tools for map animations

I am preparing some visualizations of data (mainly animated choropleths), and I am looking for suitable tools. Ideally, I am looking for something similar to this kind of animated infographics. So, I ...
1
vote
0answers
297 views

How to show elevation on mouse hover in QGIS?

I've got a DEM layer and would like to have the status panel in the bottom display the elevation in addition to the mouse coordinate. Can that be done? Using QGIS 2.6.1
0
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0answers
137 views

Polygon vertex “duplication” in QGIS?

New QGIS user, Brighton 2.5. When creating or moving new vertex points of a recently-cut polygon (hence adjacent polygons) I get "duplicate" or "criss-crossed" lines beneath the former vertex ...
4
votes
1answer
775 views

How to match a raster NetCDF data with a vector layer in QGIS?

When I load a raster layer with humidity data from NOAA database (for instance rhum.2m.2014.nc at ftp://ftp.cdc.noaa.gov/Datasets/NARR/Dailies/monolevel/) I am not able to match it with a simple map ...
1
vote
1answer
47 views

How to access layer in QGIS?

I want to get QGIS to update from a CSV file like in this How to update data from external table in real time? question, however I can't figure out what to put for "myLayer". How can I define the ...
2
votes
0answers
131 views

Polygon Layer Cleaning with QGIS

I have a little situation with my data. I have vectorized a raster layer, and now I have some issues with the geometries, as you can see in the picture. Most of errors I have are like this one. ...
0
votes
1answer
67 views

How to find length attribute form my all lines in my layer

I am a begginer for QGIS I have a column for the length of the lines, but don't know how to find it. Can anyone help me?
2
votes
1answer
220 views

How to unlock imported GeoJSON vector layer?

I have a map on geojson.io, with some fails that I need to correct. It has a feature to edit polygon's node but it's too tedious and hasn't "snapping" mode. So I've imported my .geoJSON, .shp, ....
1
vote
0answers
60 views

How to export only labels as svg in QGIS 2.6?

I'm working with a big big data set in QGIS 2.6 (but also in QGIS 2.7). I have many line layers styled with the rule rendering tool. What I want to do is to export only the labels of all these line ...
0
votes
0answers
102 views

What's the best way to convert points to raster and back again?

To convert raster grids to vector points In QGIS there we have different possibilities (grass tool "to.vect"; saga tools "grid values to points"). My problem is a little bit complicated. In the ...
3
votes
2answers
660 views

Do I need to remove older versions of QGIS?

I have installed up to 2.6.1 of QGIS on my computer. Is it recommended that i remove all older versions? Will it cause conflict if they remain?
2
votes
1answer
199 views

How to delete a double feature in QGIS?

I am working with QGis, and I have a layer that has some double features. I want to delete one of them, but not both of them. How can I do that easily?
3
votes
0answers
349 views

Why does field calculator compute area in square meters?

I am using EPSG:102748, and have set my Settings/Option preferred measurement units to ft. My CRS is NAD_1983_StatePlane_Washington_North_FIPS_4601_Feet, and when I use the measure tool, it returns ...
3
votes
1answer
211 views

How to connect lines with gaps to continuous line?

and I have a lot of this problem like in image. The two line are separated but i want a continuous line. What rule should I choose in Topology Checker? I want to know all the separated line, so i can ...
1
vote
1answer
114 views

how to generate metadata file for semi automatic classification plug in?

I am working on satellite images. The region I am interested in is only a fraction of the whole satellite images. My laptop slows down tremendously when working on the whole image. So I clipped the ...
1
vote
0answers
95 views

merge polygons of single feature QGIS

I am new to QGIS and have done some research on this topic before posting but not sure I found an answer. I have one feature that has multiple polygons (islands of a nation). In reality, there is ...
1
vote
0answers
155 views

Assigning values to vector grids using summary statistics QGIS

In QGIS, I have a 500 sqft grid overlaid onto my map. I want to perform summary statistics (sum, mean, median, max/min) on certain vector features under the grid and assign the grid cell that value. I ...
1
vote
2answers
680 views

How to batch process .txt files with X,Y data (in Arc or QGIS)?

I have a long list of .txt files that I need to convert to feature class. I can bring the table into ArcMap, right-click, Display X,Y Data, and it converts to a feature no problem. Is anyone aware ...
3
votes
1answer
131 views

What is the replacement for 'setColorShadingAlgorithm' in QGIS 2.6?

I have been struggling with setting the colorshadingalgorithm for a raster layer in QGIS with no success for the past few days. The QGIS cookbook seems to be pretty outdated. Anyways, the code that I ...
1
vote
1answer
34 views

WMS source, selecting and printing region on multiple pages

I am new with GIS software. I've imported topographic WMS source which shows whole country in ArcGis 10.2.2 and QGIS. I want to select one specific region and print it in narrow scale (say, 1:15 ...
2
votes
1answer
479 views

Getting a number from QLineEdit and passing it to the buffer function

I am developing a plugin which finds buffer. In that i am using lineedit for getting distance from the user and pass it to the buffer function. My current code throws an error "'QLineEdit' object has ...
1
vote
0answers
43 views

labels showing up as doubles

I have a problem in Qgis where all my labels are doubled on every single item (see image). I have checked the attributes list and everything seems normal. How do I show the labels properly?