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

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0
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2answers
598 views

Digitizing from OpenLayers Plugin in QGIS, or create raster?

Is there an easy method for digitizing from a layer added from the OpenLayers pluggin. As i cannot snap to it or use it as raster so the entire map does not load? two separate issues there.
2
votes
1answer
2k views

How to get Shapefile point coordinates into .xls?

How can I get just Coordinates (in a file) from point features (shapes) without big hussle. Something like Shape to .xls, with distinct coordinates? I want to use this coordinates immediately, so GPX ...
0
votes
1answer
754 views

Adding .e00 data into QGIS

I wonder if anyone can advise me on how to go about adding .e00 data into my QGIS project. I'd be very grateful for any advice, or a hint on where to find it. Thanks TVZ
0
votes
0answers
59 views

Why cant I “Add label colums to attribut table” etc. in QGIS 1.9?

Why cant I "Add label colums to attribut table" and why cant I use Letter spacing, Word spacing and so on? I have a shp-file. qgis version 1.9
7
votes
2answers
1k views

Elevation profile 10 km each side of a line

How can I get an elevation profile for a band of terrain? The highest elevation within 10 km (on each side of the defined line) should be taken into account. I hope my question is clear. Thank you ...
0
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0answers
56 views

Points in polygon stops processing at 0% Any ideas how to fix it?

I downloaded QGIS yesterday. Today, I tried to do a "Points in polygon" analysis, and it stopped working. It was working earlier today when I did it a couple times. Now, when go to do one: I click ...
1
vote
0answers
43 views

Handling save event in QGIS

I have managed to load QgsVectorLayer from PostgreSQL and add it on the map. Is possible to trap save event after editing, do my own saving, call layer refresh and in this way prevent from default ...
1
vote
0answers
154 views

How to handle mmqgis geocoding IOError: [Errno socket error] [Errno 101]?

I try to geocode a .csv file with QGIS + mmqgis plugin. But, since some days the plugin always crashes. I tried it with QGIS 1.8.0 on an Ubuntu 11.10, OSGeo-Live v6.0 (which is Xubuntu 12.04.2 LTS) ...
7
votes
3answers
448 views

assign and move centroids to their polygons

I m using QGIS 1.8 Lisboa. After calculating the centroids from a polygon shapefile, if some of them lie outside the polygon outlines, I'd like to move them on the polygon they came from. The ...
3
votes
1answer
73 views

Legend title in print composer with different font styles

I want to design a layout with print composer where the legend Title has two different font styles in one e.g. " I had it once but can´t remember". I would be grateful for help.
1
vote
0answers
50 views

Add regular points to each polygon in QGIS [duplicate]

Possible Duplicate: assign and move centroids to their polygons I'm trying to find out a method to define a unique ID based on specific coordinates for each polygon of a shp. The problem is ...
1
vote
1answer
223 views

netCDF does not display properly in QGIS 1.8

I have a netCDF file of fire emissions on a regular grid of 12 km by 12 km grid cells with 200 east-west grid cells by 161 north-south grid cells centered on the continental United States. The map ...
2
votes
0answers
199 views

How to import PostGIS layer with geography type to QGIS?

I tried to import in QGIS a layer from a PostgreSQL table with a geography type column created through the extension PostGIS. I noticed that QGIS doesn't seem to like the geography column... Here ...
3
votes
4answers
176 views

Place image without using points in QGIS

I am trying to find a GIS software that does this, so I am trying QGIS but other suggestions are welcome. I have a basic shp boundary such as a rectangle. I want to be able to import an unreferenced ...
2
votes
1answer
97 views

How to get a list of all projections that are currently available in QGIS via the PyQGIS-API

i'm building a QGIS-Plugin and i want the user to choose a CRS out of a combobox in which the coordinates he would enter into some textfields are represented, so these can be converted into another ...
1
vote
3answers
982 views

Exporting 2 shp layers to geojson using quantum GIS

I will explain with an example: I have 2 shp files for Tanzania. Tanzania inland waters http://www.diva-gis.org/data/wat/TZA_wat.zip Tanzania administrative boundaries ...
3
votes
1answer
149 views

QGIS not creating new profiles correctly

QGIS 1.8 is not creating new profiles correctly under Documents and Settings. QGIS support files are also missing in My Documents for newly created profiles. I just tried to copy the missing files ...
7
votes
1answer
289 views

Calculating Maximum Distance from Centre of a Polygon to the Boundary of a Polygon

I have a polygon ready in QGIS. What I want to do is to calculate the maximum possible distance in kilometres from the centroid of the polygon up to the boundary of that polygon. I need two things: ...
0
votes
1answer
164 views

Why are layers not overlapping to each other inspite of having same CRS? [closed]

I am new to QGIS and working with QGIS 1.7.3 version, I have my all layers in WGS 84 CRS but even though they are not overlapping to each other, What should I do ?
6
votes
1answer
218 views

how to aggregate the rates, represented by points, within X radius

the point represents rates like 10%, etc. (this was also pretty clear from 2 years ago) -- been trying to do this for 2 yrs... the points dont represent numbers of events since they are rates ...
1
vote
2answers
309 views

Where are Print Composer Template files stored?

When I saved my Print Composer template, I cleverly navigated to a logical (to me) folder among my documents to save it. Now I find that it does not show up on the list of Composers under “File”. Can ...
3
votes
1answer
121 views

How I can incorporate results of histogram stretching into georeferenced image?

I have one channel 8 bit raster and when I open it in QGIS with histogram stretching "on the fly" it looks fine. How I can recalculate original raster accordingly changed histogram?
4
votes
1answer
273 views

How can I Enable Google Earth 3D features in QGIS?

I want to ask if there is any plugin or any other way where I can use Google Earth features in QGIS. When I'm saying Google Earth features I mean to be able to see roads, towns, etc and to be able to ...
2
votes
2answers
164 views

Does QGIS georeferencing set to magnetic or grid north for British National Grid?

I have just been georeferencing a map on QGIS using British National Grid and it is not lining up with the vector maps I downloaded from OS. I used the 'From map canvas' option and used 'Linear' ...
4
votes
3answers
1k views

How to extract raster values and create new raster in Qgis?

I want to extract certain values of a raster image in order to create a new raster which then should only contain the extracted/chosen values. How to do this in QGis?
2
votes
1answer
151 views

Inland / crater watershed delination

Even though watershed delineation is a quite popular matter here, I have what seems to be a somewhat unusual demand. I start with a DEM which is constituted of a series of craters, all centered on ...
1
vote
0answers
97 views

Problems with the scalebar not CRS related in QGIS

When I add one layer to the map, open it in the print composer and add a scale bar the scale bar is fine. I can add layers (with the same CRS) and everything is fine. Once there are two layers in my ...
6
votes
1answer
490 views

Is it possible to conduct a flood model analysis with QGIS using a DEM?

Is it possible to conduct a flood model analysis with QGIS using a DEM? Need to simulate rising water levels on a 250k map.
1
vote
4answers
388 views

How to create internal polygon without overlap on QGIS1.8.0

I would like to create new polygon inside the existing polygon. It does not means donuts polygon. I would like to have two polygon without overlapping. I can create if I don't check "Avoid ...
5
votes
1answer
237 views

Is it possible to put scale(ex; 1:10000) at print composer on QGIS 1.8.0

I would like to display a cartographic scale (e.g. 1:10,000) in the print composer. I can set the scale from map tab. After setting, I can type by myself as Label. Is it possible to put scale ...
15
votes
4answers
341 views

Is the term “Quantum GIS” trademarked?

We need to link to Quantum GIS on a major official website. My legal department asks me if "Quantum GIS" is trademarked. Is it? Thanks -- Alex
6
votes
2answers
693 views

QGIS or Postgis - How to split polylines with a point layer?

In QGIS, I would like to split the polylines in a layer loaded in the workspace with the points in another loaded layer. If a point intersects a polyline, this polyline should be transformed into two ...
3
votes
1answer
259 views

How to increase resolution of DEM rasters?

Thanks to the fine folks here at the GIS SE, I have managed to batch process a load of ASC files into raster hillshade TIFs. However, while they look fine on screen, when printed they are very ...
1
vote
2answers
358 views

QGIS create layer with the points of the beginnings and ends of a polylines layer (without duplicate points)

In QGIS, i would like to create a new layer containing the beginning and end points of a polylines layer, but without the duplicate points that would result of adjacent polylines.
0
votes
1answer
83 views

Alternate option for a Data Player plugin for GPS in qgis

I found a plugin for QGIS to play a GPS Track. (Data player plugin).The Problem is I can not read .gpx File with this plugin. Is there another option?
1
vote
0answers
278 views

Connect QGIS to MSSQL view (i.e. not a table)

I've got a MSSQL view containing data I want to show in QGIS. The view transforms a BLOB field containing WKB that is in one of my tables into a SQL geometry, which QGIS will be able to display. ...
5
votes
1answer
375 views

CAD Like functions in QGIS

Is it possible for a script to be built that will use a reference point and have it draw several polygons based on distance and bearing, then assess the terrain under the polygon for highest obstacles ...
2
votes
0answers
122 views

Trouble with polygon to polygon “Join attributes by location”

I have two polygon vector layers - one of census tracts and one of water bodies. I would like to join a particular attribute from the water bodies table to each census tract, with the output being the ...
1
vote
2answers
129 views

Put color for raster data(aspect.tif) on QGIS1.8.0

I create aspect.tif from DEM file. I could put the values(0 to 360)from contrast enhancement. I could set color from color map(freakout or Pseudocolor). In here, the data is shown by only 4 colors. I ...
8
votes
2answers
347 views

QGIS Categorized Style: Rearranging values so that it doesn't go 57,58,59,6,60,61

I have a a column of data that I'm trying to display in the Categorized Style but when QGIS orders the values it ranks them, for example, 57, 58, 59, 6, 60, 61, 62.... Is there a way to rank them in ...
4
votes
1answer
254 views

The number of digit of decimal point when you calculate area of polygon in QGIS1.8.0

I would like to change the number of digit of decimal point when I calculate area. For example Now: 32.456677 Ideal: 32.46 I try to adjust "output field width" and "Precision" These don't work well. ...
5
votes
1answer
409 views

Create a new vector layer that fills space between other polygons in QGIS

I inherited a clipped (500m radius) land cover map containing vector layers of different land cover categories such as buildings, grass, roads, etc from a colleague. The empty (white) space in ...
0
votes
1answer
196 views

Can this WPS be used in QGIS?

is it possible to integrate the following WPS-LINK in QGIS? http://gdz.bkg.bund.de/wps_koordtrans?REQUEST=GetCapabilities&SERVICE=WPS
2
votes
1answer
160 views

How to add point coordinates to a non geo-referenced csv file?

I have a csv file with information but not georeferenced. I'd like to load it in QGIS and add points (with coordinates) in the same file and later save as a shapefile. Is there any way to doing that ...
5
votes
2answers
141 views

Using field calculator to delete specific contours

I have 3 contour shapefiles with 25m, 50m and 100m equidistance. Now I want to delete in the 25m-shp-file every **50m and **00m contour and in the 50m-shp-file every **00 contour. How can I show them ...
0
votes
0answers
115 views

Why can't I see some polygon labels?

I create some features of polygon. And then, I put label with labeling from tool bar. I could confirm label of few features. On the other hand, I could not see the label of another features. I try ...
3
votes
1answer
194 views

How to prepare road network for routing in QGIS or GRASS

I have been working on a road network and I want to run shortest path algorithms on it. One problem is that some lines come very close to each other, but are not connected. Is there a way to connect ...
17
votes
1answer
705 views

Gravity/Huff model tools

I am looking for a way to simulate a gravity model using a point-based layer. All my points are assigned a z-value and the higher this value, the larger is their "sphere of influence". This influence ...
5
votes
1answer
1k views

Is QGIS Supported on Windows 8?

Can QGIS be installed on Windows 8? I'm going to buy a laptop with Windows 8, but I have no idea if Windows 8 can run QGIS.
6
votes
2answers
951 views

What's the Workflow for buffering in meters/km using WGS84 layers?

I'm a little bit new to GIS, so bear with me a minute.... I'm using QGIS 1.7.4-Wroclaw and working with an SHP layer in WGS84. I want to buffer out to a certain number of kilometers from this layer ...