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

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144 views

Delete duplicate spatial point/points in mssql from a perticular location

I am working with a Spatial data which has a street intersection points.... I get the intersection points from spatial query on street/roads datain MMSQL . but in my case some streets/roads are multi ...
4
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1answer
183 views

How do I manually classify graduated data in QGIS?

Is there any way to manually classify Graduated Data in Qgis. In ArcGIS I always used to apply first the natural breaks method to find adequate group sizes for good visual interpretation. Afterwards I ...
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1answer
208 views

How to remove all selection from all registered layers using QGIS plugin?

I want to remove all selection from registered layer in QGIS using Python. I tried to clear the map canvas using: self.iface.mapCanvas().clear() self.iface.mapCanvas().refresh() but the ...
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1answer
192 views

How to cut multiple neighboring raster images

I'm looking for a way to cut a larger number of neighboring aerial raster images (each sized 1x1 km, resolution 10 cm per pxel) into four smaller raster images (size 500 x 500 m). I haven't done this ...
2
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1answer
158 views

How can I delete a shapefile using OGR?

In my QGIS Python plugin, I use shapefile layers and I am having a problem rewriting existing shapefiles. Is it possible to delete a shapefile from disk using OGR?
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0answers
80 views

Qgis raster interpolation shift

Using Qgis 2.0.1, I'm attempting to interpolate a large point dataset (n > 400K) to a raster surface. I'm using the IDW option in Raster>> Interpolation>> Interpolation, and the resulting ...
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1answer
315 views

get data from WFS and present in using d3js - correct projection

I'm trying to get data for map of Poland. I found WFS service that provides GML files. It is located under: http://sdi.geoportal.gov.pl/wfs_prg/wfservice.aspx?request=getCapabilities&service=wfs ...
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1answer
40 views

Some gridlines missing in QGIS Print Composer

I'm very new to this so please excuse my ignorance. I've been working with OS data and my own shape files and had no problem with print composer. Suddenly my OS gridlines are not appearing ...
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1answer
226 views

How to get additional subbasin areas designated by points in the river network?

Update 14/1/9:I follow this post:Watershed and Stream Network Delineation, and here's my workflow: use Batch Point Generation to create batch points related to designated points(green dots) Batch ...
2
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0answers
47 views

how to assign unique attribute value per neighborhood? [duplicate]

I have a feature class of adjacent polygons and I want to assign an integer attribute value to my polygons based on the following rules : a polygon must not have the same attribute value than any of ...
2
votes
2answers
693 views

Table join with .csv file results in null fields after join

Similar to questions already asked about .dbf files, I'm attempting to join .csv files to a .gdb or shapefile coverage in QGIS. The tables as added to QGIS prior to the join look fine, but after the ...
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1answer
772 views

How do I solve this dependency error in openSUSE 13.1 when installing QGIS (master)?

I am running OpenSUSE 13.1 and downloading via Yast I get the following error: nothing provides libpq.so.5()(64bit) needed by qgis-master140102-1.2.x86_64 I get three of these errors, for each of the ...
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3answers
713 views

How to install Fiona to read Shapefile attributes with OSGeo4W?

I´m developing a plugin in Python and I need to read the shapefile attributes, so I found the Fiona API and dbfpy also but I don't understand how to install these packages because I install the QGIS ...
0
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1answer
212 views

error of data conversion value getting while importing shapefile in shp2pgsql-gui on ubuntu

Connecting: host=localhost port=5432 user=postgres dbname=tremblement_de_terre Connection succeeded. Connecting: host=localhost port=5432 user=postgres dbname=tremblement_de_terre ...
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1answer
307 views

When will QGIS use the WMS supplied legend images ? is there a workaround?

I use a lot of wms services with complicated maps : a legend is essential. Qgis displays none of those legends. The URL is quoted in the metadata. example WMS ...
2
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1answer
759 views

how to use rectangles ovals digitizing in qgis

i added the new vector layer in QGIS and I want to draw a cicle of 500M or 1000M from center. I also added the pluginn Rectangles ovals digitizing in QGIS. But the options of this pluginn is not ...
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0answers
267 views

New values created with QGIS field calculator become null upon saving

I'm having a problem with QGIS. I'm trying to create a new column in the attribute table for a shapefile. The numbers in the fourth column (see screenshots) are currently strings, so I want to convert ...
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0answers
135 views

How to add and join Geodatabase Table to Feature Class in QGIS?

After finally figuring out how to open .gdb files from Arc 10 in QGIS, I need to join some tables to the spatial gdb coverages I've opened in QGIS. According to the colleague who converted the .gdb ...
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2answers
307 views

Road Graph Export Empty QGIS

Exporting the results of a shortest path analysis through the Road Graph plugin in QGIS 2.0.1 results in an "empty" layer. After running teh shortest path calculator, I selected export --> new ...
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0answers
276 views

Distorted Google Maps layer in pdf export from QGIS 2.0.1

Export of a map from QGIS 2.0.1 Composer to pdf results in distortion (changed scale) of Google map layer. Why?
3
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1answer
1k views

How do I install and run SEXTANTE for QGIS 2.0?

I just upgraded to QGIS 2.0, and I have been unable to locate/use SEXTANTE tools. A search with the plugin installer does not turn up anything for "sextante." Any idea what is going on?
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0answers
292 views

SAGA/GDAL fails to open grid in QGIS 2.0.1 on OSX 10.6.8

I want to try different grid/raster spline interpolation methods using SAGA in QGIS. I'm using the kyngchaos build 2.0.1-7 for Snow Leopard. Every SAGA algorithm I try gives the following in a popup: ...
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1answer
122 views

How do I use gdal_proximity.py from the QGIS python console?

How do I run gdal_proximity.py from the QGIS python console?
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0answers
68 views

Is there a limitation in quantity of joined tables using spatialite views?

I've one point layer in qgis and several non spatial tables in a spatialite database. Now I want to create a view as you can see in the following: CREATE VIEW testansicht10 AS SELECT ...
4
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1answer
1k views

How to add a custom map tile layer?

I am trying to display the following background map in QGIS 2.0: http://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer/tile/${z}/${y}/${x}. In a custom web map client, this is ...
2
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2answers
102 views

How would you illustrate this in a report to a client?

The objectives are simple: They're adding a train station and the goal is to display how far you could get within 30 minutes before and after the new station is built. In this map that I'm working on ...
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0answers
105 views

Whats the status for OSM in print composer QGIS 2.0?

I have a Stamen Toner OSM background on a report am doing. It seems impossible to use "Print" or "Save as image" functions since the OSM is being projected wrong with 10 km or so.. Right now I'm ...
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1answer
39 views

How to make pen style show up correct in QGIS map composer legend?

As far as I can tell, yes I've updated the legend. See new screenshot. It's like the field width is cutting them, they all begin with one long and then one short line.. I have a several different ...
6
votes
1answer
217 views

How do I change an existing srs in QGis?

I am showing postgis data with srid 28992 (Amersfoort / RD New). But when I plot the geospatial data on a map (with openlayers plugin), the data is shown a hunderd meters off because the datum shift ...
2
votes
3answers
254 views

Shapefile with overlapping polygons: calculate average values

I have a very big polygon shapefile with hundreds of features, often overlapping each other. Each of these features has a value stored in the attribute table. I simply need to calculate the average ...
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1answer
170 views

How to create labels using 2 columns?

I want to label a layer with 2 columns/attributes. It´s not a problem in Mapinfo, but can it be done in QGIS as well?
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2answers
505 views

QGIS 2.0 won't open on OSX Mavericks [duplicate]

I successfully installed QGIS 2.0 on my macbook running OSX Mavericks, but when I attempt to open the program, I get the following message: "QGIS cannot be opened because of a problem. Check with the ...
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0answers
44 views

Import processing in qgis 2.0 [duplicate]

I know that this question has already asked but no concrete answer has given!! My environment is Ubuntu 12.04 and I'm using eclipse-pydev as IDE. Thanks in advance for helping me.
2
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1answer
229 views

Why are xy coordinates displayed in my WGS84 project instead of lat/lon?

I have a project in QGIS comprised of shapefiles and raster maps. The origin CRSs are mostly on ETRS89 / Portugal TM06. I am trying to convert the project to WGS84 to have lat/lon instead of metric ...
2
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2answers
146 views

How can I close the identify result dialog programmatically?

I am trying to close the identify result dialog which appeared when I select to identify a feature from the active layer. Does someone know how can I do it?
3
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1answer
54 views

Input field not showing up in Distance Matrix In QGIS 2.0

I tried to perform a Distance Matrix analysis of building centroids. I have a two building centroid layers. The attributes in both the tables are name, osm_id, perimeter and area. In the Distance ...
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1answer
412 views

Calculate distance of points along a route QGIS

I have a line layer and a point layer, I need the distance between the first and the last point measured along the line. How can I do that using QGIS? Do I need to know linear reference? I don't ...
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2answers
286 views

QGIS split shp into different layers

I'm building my first map, so please forgive me beginners mistakes. I've downloaded QGIS 2.0.1 and following tutorial I was able to download data from ...
2
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0answers
138 views

Is there recommended true type font for search and rescue?

Has anyone run across a true type font set to use for search and rescue cartography, and/or fire cartography? This is specifically for Terrain Navigator Pro which isn't really a GIS application but ...
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0answers
131 views

Extending “How to add complex Emergency Symbology (TrueType fonts) to QGIS?”

I have used the technique as outlined in How to add complex Emergency Symbology (TrueType fonts) to QGIS? but have run into some difficulty. I have used this technique for a map of water assets that ...
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2answers
477 views

QGIS 2.0 and Debian Jessie

I added the official QGIS repos to my installation of Debian Jessie using the instructions on the official QGIS page. As of now, there appears to be some packages missing from the repos that resolve ...
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0answers
11 views

How to display only layers where is my selection in clipper?

I'm using the Raster->clipper plugin to clip raster layers but I've a lot of layer and every time I have to search the right one in the big list in the input raster file. I would like to see the list ...
0
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1answer
121 views

Plugin QGIS Error “QTextEdit.setPlainText(QString): not enough arguments”

I try to make save as button but i got this error message when try to save file in my directory File "C:\Users\Mr.Pakde/.qgis2/python/plugins\condition\conditiondialog.py", line 80, in saveAs ...
0
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1answer
165 views

How to automatically convert line features into polygons using QGIS/PostGIS?

I have a master table of line features and a number of tables that I use to join (in the SQL sense) to produce various layers. Some of theses layers consist of boundaries of administrative zones ...
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0answers
38 views

Does map export using GarminCustomMap plugin for QGIS work on Mac OS?

When I try to export a map using GarminCustomMap (1.4) plugin QGIS 2.01 on Mac OS 10.9 quits with no messages. I suspect this might be a Maverick related issue. Is anyone successfully using the ...
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0answers
112 views

Can QGIS create a “virtual view” from a given position?

I would like to be able to choose a position on a map (by clicking, or by entering an address, or other means -- please suggest) and have an artificial picture created, like what I would see if I ...
5
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2answers
187 views

bicycle / bike map road grade markers - semi-automated?

So I'm making a bike commuting map for our area, and one of the features to show (common on a lot of bike maps) is some type of road grade marker. We're planning to show three categories: 'kinda ...
8
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1answer
303 views

Where is this raster offset being introduced in the QGIS processing toolbox?

I'm using the (awesome!) processing toolbox in QGIS 2.0 to reclassify some NoData values in a raster from -9999 to 0, but at some point in the process there's an offset of about 0.2 degrees being ...
5
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1answer
134 views

How can I get the field index of the new layer in my script using Python?

I am trying to use layer.changeAttributeValue(fid, fieldIndex, value) to add values to a field in QGIS Basically, I'm creating a plugin which will, if a checkbox is ticked, create a new field, then ...
1
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2answers
332 views

How to add a new column in attribute table with attribute with indexes of another max-min ordered attribute field?

I've an attribute column named e.g. VALUE with different values I would like to make a column named e.g. ORDERsuch that the greatest value has the attribute 1 the second value 2 etc. etc. so order ...