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2
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1answer
238 views

Trojan in QGIS 2.12.3?

I have installed the latest QGIS, version 2.12.3. However, when I open it, Symantec says that it has discovered the trojan SONAR.TCP!gen4. See ...
1
vote
2answers
55 views

check the “quality” for (poly-)lines (density of vertices)

I want to check the quality of digitized tracks. I suppose, that a track with a lot of regular vertices has got a good quality. And a track with less regular vertices has got a poor quality. Maybe, ...
1
vote
0answers
38 views

Geocoding and SRID - can't get desired SRID

I want to geocode a set of addresses with GoogleMaps, store the results in a different SRID in a PostGIS table and then project it in QGIS over a layer with the identical SRID. So far, it has been a ...
4
votes
2answers
128 views

How to display vertex markers in QGIS for non-editable layers?

I've a PostGIS layer with read-only privileges. Is there any way to display the vertex markers of the layer?
1
vote
1answer
44 views

Navigating to Lat/Long in QGIS with a relative coordinate system

It seems really fundamental, but how do I pan the map center to a decimal lat/long in QGIS? I would type in the lat/long at the bottom, but I use WGS 84/Pseudo Mercator to use the streetmap from ...
1
vote
1answer
65 views

How to set conditional imports for a PyQGis script running inner or outer of QGIS?

Related to Cannot run standalone QGIS script I try to detect if my script is run from a QGIS instance (through the plugin) or from a standard python console. This detection will enable conditional ...
3
votes
1answer
61 views

Raster Layer Statistics CSV Output using QGIS Graphic Modeller

I am currently working on a project where I am using historical cloud coverage from MODIS Cloud Fraction data to try and estimate future cloud coverage of any particular month. I currently have ...
2
votes
0answers
77 views

LAStools in QGIS 2.8.5: “missing dependency. lastools folder is not configured” [duplicate]

I am using QGIS 2.8.5 Wien and I am trying to install LAStools toolbox. I followed the instructions in rapidlasso.com to install it. I did everything said on the link, but when I tried to run it, it ...
3
votes
1answer
122 views

Convert KML to GeoJSON with ogr2ogr and remove KML special attributes

I'm trying to convert KML to GeoJSON (or some other formats) using ogr2ogr (look at this question). It's all working fine, except of one problem: I'm always receiving these metadata attributes with ...
-1
votes
1answer
92 views

Receiving GDAL Clipper Error from QGIS? [duplicate]

I realise there has been quite a lot of discussion on this topic and have already read through the suggestions on this forum of how to rectify this problem, but still nothing has worked. I am ...
4
votes
1answer
77 views

Working Windows Standalone .EXE From QGIS Python Script Using PyInstaller?

Has anyone been able to create a working standalone Windows .EXE file from a QGIS Python Script Using PyInstaller?
2
votes
1answer
65 views

QGIS2web page does not display curved labels

I have designed a non-real map, using QGIS. Until now, my map was very basic (a few layers with some polygons, dots, and lines). This map is a "decal" from a raster image. I recently add some custom ...
1
vote
0answers
38 views

Measuring in Print composer and main layer window in QGIS 2.12.3 does not match

I work on the municipality level and I am composing print maps with scalebar. I noticed, that length (or scale of my maps) is presented different when items are measured in my main QGIS 2.12.3 layer ...
2
votes
1answer
66 views

Is it possible to show data when hovering over an item with qgis2web (OL3)?

I'm using the qgis2web plugin and I want to show the records behind the different items on the map when I am hovering over them. Is that possible when you have layers devided into groups? And my ...
1
vote
3answers
68 views

QGIS export feature coordinates

I have a big project (whole country) and it contains smaller features (administrative units). My project is in .shp. How to export features' coordinates one by one or all at once as long as all ...
2
votes
1answer
52 views

Reprojection issue from WGS84 to UTM32

In QGIS I want to transform a point shapefile from WGS84 to UTM32 (EPSG:4647). The result moves the point from somewhere in Norway to a position off the coast of Congo, Africa. Can anyone explain ...
3
votes
2answers
157 views

Find points that are unique between two tables

I have been trying to work out a query that returns the geometry of points that are unique (eg. not supliacte). Is there a simple way to perform it in just one query? geom is the only common ...
2
votes
1answer
90 views

QGIS modeler: Error when extracting by non existing attributes. How to avoid displaying of error?

I have a problem with the QGIS modeler: The idea is to extract attributes ("DN" between 40 and 44) out of one layer. I want to use the outcoming layer for further algorithms. I calculated with ...
1
vote
0answers
37 views

How can I calculate times with gps data using random points on the track? [closed]

I have GPS data from a car that is circulating all the time in a closed circuit. I need to put a few points along the route, about 3 or 4 and calculate the time it takes to get between points. These ...
1
vote
1answer
35 views

Why doesn't Ordnance Survey street view raster layer appear on qgis map?

I've downloaded the relevant 100 km square of OS Street View raster data and have added the relevant 5 km square to a QGIS 2.8.2 map of scale 1:1500. The layer can be seen in the layers menu but not ...
3
votes
0answers
24 views

Can't open my saved .qgs file in QGIS [duplicate]

When I try to open my .qgs file I get the following error: It says that the project can't be opened, and that something is wrong when trying to read the project file, this is my translation. Can I ...
5
votes
1answer
91 views

Sequentially distilling several raster data sets into final map based on first time pixel’s value was greater than zero?

I have 120 daily data sets that contain a value only when a threshold temperature is exceeded. If the threshold has been reached that pixel was assigned a value indicating the day it occurred (the ...
1
vote
1answer
36 views

Changing legend label when cycling through Atlas created with QGIS composer

I have project which gets updated regularly and can have multiple areas which need to be mapped individually to go into separate reports. I generate an atlas in the composer and I have created a ...
1
vote
1answer
36 views

How do you view data contained inside hidden directories with QGIS browser?

I am attempting to browse data in a hidden directory, but the QGIS Browser tree view doesn't show in hidden folders? I know, I know...it's hidden. But is there a command-line switch to override this ...
0
votes
0answers
3 views

Retaining Raster Point Data Using wms [duplicate]

I have a single band raster being served via geoserver wms. When I view the raster through geoservers built in openlayers viewer I get different point value results than if I ask geoserver for a ...
4
votes
1answer
82 views

QGIS Finding valves to turn off for water lines

I am wondering if there is a tool for QGIS that can do what I am about to describe. It might be in network analysis but I am not sure. I have used water gems but it does not do what I want it to do. ...
1
vote
2answers
168 views

Export/Convert .tif + tfw into GeoTiff with tagged Metadata (coordinates)

What is the correct command line for using warp_management in Python (ArcGIS 10.1), to convert several georeferenced .tif's (or folders) with XML world files to GeoTIFF's with permanently written ...
2
votes
1answer
36 views

How to avoid point stacks?

When geocoding a dataset of about 500 adresses I get a vector point layer. As far everything is fine. The problem is, that the dataset contains multiple entries with the same adress. The result is a ...
1
vote
1answer
84 views

pyqgis: Add GeoJSON as editable Layer

following GeoJSON should be added to QGIS as an editable Layer: ...
3
votes
1answer
41 views

QGIS - Field Calculator: scale_linear gives unexpected result

When I try to use scale_linear, its output isn't as I expected. My values are from 1 to 16, so I set domain_min = 1 and domain_max = 16. I want to interpolate to interval from 1 to 4 so I set ...
1
vote
1answer
63 views

Map composer issue

I am using QGis (latest version, OS X) and whan I create a map on map composer everything works fine. I export the map to pdf file and also goes fine. But when I save and close it and then close the ...
1
vote
0answers
64 views

QGIS - Alternatives to Offline Editing Plugin

I am looking for a way to edit my postgis layers offline (in field) using a Microsft Surface Tablet. I have been testing the "Offline Editing Plugin" unsuccessfully. These are the issues I have ...
1
vote
1answer
58 views

QGIS Installed Components

We have QGIS installed and our users have roaming profiles. Some of the files which are installed under the .qgis folder in the C:\Users\username directory can grow quite large. These large files ...
1
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0answers
39 views

QGIS GeoSearch Plugin Issue

We are trying to use the QGIS GeoSearch plugin and intermittently receive issues with it. We know what the cause is and we wondered whether anyone else experienced this issue and had a solution? We ...
1
vote
1answer
34 views

How to create a grid point layer from a txt file in QGIS?

I have a ascii file (.txt) with the following columns ID, long, lati, value where long, lati are the coordinates (long/lat) of the cell centres of a LAT/LON grid with resolution of 30 arc seconds. ...
0
votes
1answer
60 views

Repositioning DXF Imported into QGIS?

I have a polyline drawing from AutoCAD that I would like to reposition manually, if possible. During my efforts so far it has been turned into both a tab file and shape file. The main source of ...
2
votes
2answers
61 views

Clipping a shapefile in QGIS that has user defined projections

I have two shapefiles for Rwanda which have user defined projections. I am trying to clip the geology shapefile so that it has the same spatial extent as the districts shapefile. When I clip, I do get ...
1
vote
1answer
80 views

How to make one checkbox that shows multiple layers in qgis or qgis2web?

I need to create one checkbox in qgis (and qgis2web) that than will show 2 other layers. So basically i don't want to check two checkboxes in the layerlist, but i want to simplify this proces by just ...
4
votes
0answers
45 views

Combine multiple adjoining parts of a single feature

In QGIS, one polygon feature resulted from merger of several adjacent polygons. This one new polygon feature has a single line through it that I would like to eliminate. When hovering over individual ...
2
votes
1answer
79 views

Colour coding vector layers?

Based on a previous post, I tried to implement this in the expressions tab: CASE WHEN "dBM" <= 0 THEN '255,0,0' WHEN "dBM" > 0 AND "dBM" <= 20 THEN '255,255,0' ELSE '0,255,0' ...
1
vote
0answers
15 views

QGIS DB Manager hanging on import

I have a data set which is an extract from OSM. I'm only using the roads shapefile and adding labels. The extract is the state of Pennsylvania. I then tried to import this layer to PostGIS from the DB ...
5
votes
3answers
158 views

Differentiating bare soil and urban areas in Landsat 4-5 land cover classification?

I am trying to classify a Landsat 4-5 image using the semi automatic classification plugin (QGIS). I always get misclassifications between bare soil and urban areas as they have similar spectral ...
2
votes
1answer
82 views

Mapping out 3D points with QGIS2threejs

I have some points I would like to map out in 3D. The points were gotten from a GPS module athat was attached to a Raspberry Pi. This is the settings I used before starting qgis2threejs: This was ...
1
vote
1answer
55 views

Changing CRS in QGIS due to pop up window: "CRS warning! Warning: Input layers have non-matching CRS. This may cause unexpected results.” [duplicate]

I'm using GIS to map the movement of animals and their speed and density in different habitat types using shape polygons. When I got to the step ;Count points in polygon' a pop up window appeared ...
4
votes
1answer
82 views

Find out if overlaying polyline matches polygon centerline in qgis

I have a polygon and a polyline and I need to find a scientific way of how close that polyline is to the actual polygon centerline. Is there any way of doing this in qgis? Any extensions, models, ...
1
vote
0answers
74 views

QGIS LYON desktop cannot be opened on windows 7

I have installed QGIS lyon from http://qgis.org/downloads/QGIS-OSGeo4W-2.12.3-1-Setup-x86_64.exe on win7. I did not install the default data set. On my desktop, there are some icons of QGIS. ...
2
votes
1answer
72 views

Extracting NDVI using QGIS from multiple images to Excel?

I created 25 images in QGIS. Each image has different information about the NDVI of the area. How can I extract mean, max, and min information about the NDVI from each image and put it in Excel?
2
votes
2answers
47 views

How to eliminate points by difference (vector geo processing tool)?

I have a point that falls outside the bounds of my area of study. What I did was select it and resorted to vector commands - GIS - difference. Unfortunately I can not get the desired result. My ...
3
votes
2answers
99 views

Changing pixel size in 'asc' file using Qgis?

I have soil data and BioClim data from Australia soil data: rows 2200 columns 1400 pixel size 0.0025, -0.0025 255 BioClim data: rows 660 columsn 420 pixel size 0.00833333, -0.00833333 I am ...
1
vote
2answers
88 views

How to combine two polyline shapefile together

Here is my question Two shapefile: * A: represent the outer boundary of the city area * B: represent the inner boundaries of the city divisions. I want to * Combine these two shapefile * ...