0
votes
0answers
8 views

QGIS - Select points from shapefile where field value equals value in another shapefile

I have a line shapefile and extracted its nodes to a point shapefile, where all features have the FID of original line. After that, I've broken the point in two groups, exported to different shapes. ...
6
votes
1answer
223 views

Automatically aggregate German ZIP codes by the first two digits in a shapefile

I have a shapefile which contains all German Zip-Codes in a a five-digit format (e.g. 80637). For what I intend to do, this is way to much detail. I would like to aggregate all Zip-Code areas by the ...
1
vote
1answer
16 views

Parameter values to create a vector grid with 1km x 1km cells?

I created a shapefile from WKT in QGIS using the values from this link. I want to create a vector grid with 1kmx1km cells but I can't figure out what values need to be set for the X and Y parameters. ...
3
votes
2answers
34 views

Why do I get an empty shapefile when converting this KMZ in QGIS?

I have downloaded a KMZ file containing global elevation information. I have tried to convert the data to a shapefile using qgis (save as shape option) and using the zonum solutions website but both ...
1
vote
0answers
21 views

Converting QGIS Labels to a Polygon Shapefile

I am trying to label a shapefile layer (polygons) and then take those labels and export them as polygon shapefile features mimicking the labels In other words, each individual letter is actually a ...
0
votes
1answer
45 views

How to create input data for the LRS plugin from an excel table without coordinates?

I'm working with QGIS 2.2.0. I want to add a shapefile from an excel file that has informations I want to use in the LRS plugin. The excel file has no geographic information. Every time I try to save ...
0
votes
1answer
31 views

How to join information from an excel table to a road feature in QGIS?

I'm working with GQIS 2.2.0 Valmiera. I've made a shapefile of a road that consists in a single line. Now I want to add information that I have in an excel table about several point in the road. How ...
0
votes
0answers
32 views

Problem reducing the width of the attributes fields of a shapefile using python

I have a shapefile with rather long attribute widths (which is resulting in a rather large file). I am trying to trim it in python, here is my code: layer = qgis.utils.iface.activeLayer() ...
0
votes
1answer
33 views

why can't i export geometry data from a shapefile?

I saved the layer using "vector save as" box but even when adding GEOMETRY=AS_XY in the layer box, the csv only showed the id and no gemetry data.
1
vote
0answers
16 views

Generalisation Help for large amounts of Shape layers (QGIS)

I'm sorry if someone has asked this already I just haven't been able to find the right thread. I'd like to re-explore/update: What are the existing solutions to automate generalisation/simplification ...
1
vote
1answer
73 views

Problem opening shape file in qgis

I am having a problem opening a shape file using QGIS using 'add vector later'. This is the error message i am getting: /Users/Conrad/AmerindianLands 2/Amerindian_Land_Karasabai.shp is not a valid or ...
4
votes
3answers
97 views

How to shrink polygon on two sides?

I have a polygon which I know is a rectangle, although it may be at any orientation: I want to shrink this polygon by a third of the width from two sides, so that I just get the strip in the middle ...
0
votes
1answer
24 views

Problems converting csv to shp in QGIS 2.01 on a Mac

When converting a csv to shp, I have been using the 'Add delimited text layer', and get one of two errors. With 'First record has field names' clicked, I am told that there is 'no data found in file'. ...
1
vote
1answer
58 views

How to create polygons from a polyline graticule?

I'd like to make a polygon shapefile out of a polyline shapefile showing a graticule. However, using the "Line to Polygon" tool results in a peculiar...something: Other standard tools like ...
3
votes
0answers
24 views

Why does the QgsVectorFileWriter have probelms creating vector files?

I am using QGis 2.0.1 and have tried to create a new GIS feature file (SQLite, Spatialite, and Shapefile) of a subset of the data. I am then saving a copy of the style of this layer and applying it to ...
0
votes
0answers
32 views

Why can't I save a line shapefile?

I'm working with qgis v. 2.0.1. I have some data points and I just wanted to create a new shapefile with line geometry. In the new vectorlayer-window, I added some attributes (approx. 10) and klicked ...
0
votes
1answer
39 views

Why is shapefile layer not visible on WMS layer in QGIS?

In my QGIS project I have added a WMS layer for which the CRS is WGS84 EPSG:4326. Now I want to show my shapefile layer which has the same CRS. QGIS shows the layer separately but does not show with ...
1
vote
1answer
49 views

Update postgres/postgis point data attribute from another enclosed polygon shapefile in QGIS

I have a placename point table in postgis with 'district' column. a districts polygon shapefile with district name in 'Name' column. See the image below. I would like to update the 'district' ...
0
votes
2answers
41 views

Is there any way to use open source tools to make sure that lines on a map dont overlap?

I am a generalist developer getting the hang of basic gis. I made this geojson map by clipping and converting different shapefiles. The problem is that the precincts of New Orleans extend into the ...
0
votes
0answers
33 views

QGIS/MATLAB add geo-coordinates flag

I've created some polygons in QGIS with which I'd like to create some thematic maps. Unfortunately, if I want to import the shapefile in MATLAB with: shaperead('nameoffile, 'UseGeoCoords') i get an ...
1
vote
1answer
48 views

QGIS combine Vectorlayer and Rasterlayer to one shapefile

I have to create some Thematic Maps, especially Choropleth Maps on Matlab. Therefore i've found a shapefile which I can use, but need to draw some lines there. I've imported my shapefile as a Vector ...
0
votes
0answers
14 views

buffer in qgis from layer text delimited

I have a layer of polygons in British Columbia, Canada in WGS 84 which is fine. Later I created shapefile of three points (using decimals for lat and long) through the add shapefile as text delimited ...
0
votes
1answer
50 views

Cut polylines at intersections in QGIS (or how many km road for each country)

I want to measure how many km a road stand on each country it intersect (i.e. how many km of the european road "E45" stand on Italy, Austria, Germany, and so on). I have a polyline-shapefile with the ...
1
vote
1answer
57 views

Showing unknown SRS(native srs) on GeoServer when importing shape file into GeoServer

I am facing the problem on unknown srs when I am importing shape file into GeoServer. I am trying to imaport a shape file into GeoServer But when I am publishing the shapefile it giving the Unknown ...
1
vote
1answer
110 views

Problem creating point shapefiles programmatically using python in QGIS 2.2

I am trying to create a point shapefile in the memory buffer (for a temporary label) and then zoom to the extents on this buffer. The working (in version 2.1) test code for this is: def ...
1
vote
1answer
38 views

When I join a table to a shapefile and then export it the titles of the columns are transformed to data1, data2

I'm using QGIS 2.0.1 The table is in an excel format that i import through "add vector" and the shapefile is a polygone I join the attributes by right clicking the polygone-->properties-->join Then ...
0
votes
1answer
40 views

Can QGIS report/calculate areas/perimeters of individual polygon components within multipart shapefile?

Can QGIS report/calculate the areas/perimeters of individual polygon components within a multipart shapefile without using the "explode" vector tool to generate a new file? using QGIS 2.2.0 on ...
2
votes
1answer
69 views

How can I rasterize individual features in a shapefile?

I have a large number of polygons that are overlapping. I'd like to create a heat map and plan on using raster calculation to do this. My plan: to give each polygon a raster value of 1, and adding ...
1
vote
1answer
105 views

How can I use Openflights database in QGIS?

I would like to have a shape file with the airports position and the routes of the planes I've found Openfilghts but I can't use it in QGIS. Seems that the format of the DB .dat is not supported by ...
0
votes
0answers
17 views

MSHP file from SAGA tough to delete

After running a SAGA line dissolve process in QGIS, an MSHP file is created (amongst other things). Fine by me, though I'm not sure what it's used for (metadata in XML format?). Problem is that it ...
-1
votes
1answer
58 views

Mapinfo and qgis file's datum problem [closed]

please refer to following link for the explanation of the problem I had. do you have any idea on this? ...
0
votes
2answers
79 views

Robust importing of shapefile into spatialite database?

I am trying to import shapefiles into a spatialite database using spatialite-gui. I am having problems with the types of the variables since spatialite-gui has no obvious way to handle shapes which ...
0
votes
0answers
13 views

How to export style in sld-format using attribut fields of a shape? [duplicate]

I have some ESRI-Shapes with a .dbf each. In the dbf-File there are attributes like a string. Now i can use one or more attributes to display for example a text on a point by configuring a style. This ...
1
vote
1answer
54 views

draw multipart polygon with one surrounding border

As you can see on the image below, the waterbody is divided by the border line because it consists of several polygons. I could merge the polygon, but I dont want to change the shapefile. Is there ...
0
votes
0answers
54 views

QGIS and usage of ExportToKML()

I am trying to dump to a csv file the geometry (and attributes) of a shapefile, including a KML dump (using a python script as described in shp-to-csv) but I am unable to get the correct coordinates ...
1
vote
1answer
47 views

How to set symbology type and color based on data?

I have a point vector layer with several attributes in QGIS Dufour. One of them is satellite name, and the other is date. I want to display different dates with different colors (using some gradient) ...
0
votes
0answers
42 views

Export additional data with ogr2ogr

I am trying to import my ESRI-shapefile with OGR2OGR to an existing mysql table. This works fine but unfortunately only the featureID and the geometry data is exported. How do I add the labels of the ...
0
votes
1answer
58 views

How to view attribute information in shapefile using QGIS? [closed]

I have a polygon shapefile (*.shp) and want to view its attribute data. How can I do this using QGIS?
0
votes
1answer
44 views

Open multiple hyperlinks in one point directly from QGIS?

I have an enormous shapefile and each point has about twenty different attributes. About five of these twenty are hyperlinks- is there anyway to open these directly from selecting a point in QGIS? ...
0
votes
1answer
123 views

How to extract geo data out of a polygon shape file into csv kwt [duplicate]

I have a polygon shape file that contains all the neighborhoods in the Netherlands. My aim is to export the neighborhoods and coordinates to csv file (KWT). Without success I tried (with QGIS) these ...
1
vote
3answers
208 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
votes
2answers
75 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 ...
2
votes
3answers
75 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 ...
1
vote
1answer
62 views

Is it possible to insert note to remember the info of a project?

Sometimes I need to open an old project, and mostly I remember how it works (i.e. the structure, the formatting and so on) but sometimes not. At other times I open a project composed by a colleague ...
0
votes
2answers
67 views

How do I make shapefiles that I converted from .KML appear in QGIS?

I have created shapefiles from Google Earth but they do not show in QGIS, whereas in ArcGIS they do. I have made sure they are at the top of the layers, not transparent and also I have changed their ...
1
vote
1answer
41 views

not all polygons showing up in qgis 2.0

I am working with the block group shp files that I got from tiger 2010. When I bring in the shp files some of the block groups show up, but this is spotty. I have adjusted the CRS and still nothing. ...
0
votes
0answers
84 views

export from .shp to .gpx and .kml fails

I've just upgraded to QGIS Dufour and I am having some problems with the exportation of a simple track from .shp to .gpx and .kml format. I imported from mi smartphone a .gpx track (SR WGS84 ...
1
vote
1answer
70 views

Polyline (shp) layer not displaying correctly in QGIS

I'm a new QGIS user. I'm trying to convert a polyline vector layer to polygon. I tried to it in ArcMap 10.1 but it misses a lot of polygons. So, I'm attempting to this in QGIS running the process ...
1
vote
1answer
92 views

Problem with projection of layers in QGIS

I'm having a problem with projections in QGIS that i hope someone here can help me with. I have been searching and found other people having the same problem, but have not been able to solve mine ...
1
vote
0answers
67 views

Is there a way to build topology and work with topology relations in PyQGIS?

Is there a way to build topology and work with topology relations in PyQGIS? I'm asking because I need to run some custom generalization algorithms on my data, and I need to preserve topology. ...