0
votes
1answer
51 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
21 views

Software needed to cross-reference geocodes to a Shapefile

I do not have any GIS software except Microsoft MapPoint. I have State district KML and Shapefiles of the districts. I am assuming these are for ArcGIS. I do not want to draw maps. Instead, ...
1
vote
2answers
210 views

unionize intersections of merged polygons

[Updated quesion] I am using the following code to merged polygons from shapefiles for the purpose of calculating the surface area; library(maptools) library(rgdal) library(rgeos) #enter slots, ...
0
votes
0answers
19 views

Program crashes when trying to do intersection.

I'm trying to get the intersection between a highways shapefile and some states in Mexico but it seems that the program always crashes. I attach the images of what I'm trying to do and the error that ...
1
vote
1answer
85 views

Load Raster Values into Shapefile [duplicate]

I have a shapefile containing many points. Some of these points fall within an area for which I have raster data. I would like to load the values of the raster which underlie each point into the ...
0
votes
0answers
172 views

QGIS - Intersect two shape files

I need to create a new shapefile from two existing shapefiles with QGIS. The original shapefiles are both for the US and contain the borders of congress districts in different years (the borders ...
1
vote
2answers
161 views

How to intersect shape files with elevation models?

I have a high resolution digital elevation model (DEM) and a line shape file displaying a bycicle track. The DEM has 1 meter resolution. The line shape is something like 25 km long. What I need is a ...
2
votes
1answer
241 views

Help building SQL query to get a list of streets of a city

From two layers in PostGIS (osm_places and osm_roads), I would need to have the roads belonging to a certain city. It would be fair enough to get the street names of all streets in a radius of X ...
2
votes
3answers
110 views

Breaking a continuous contour shapefile into smaller parts?

I created this contour shapefile and I need to break it into smaller parts so its better to manage. I also have a line shapefile of where I want the breaks. Is there a way to intersect and break them? ...
4
votes
2answers
120 views

Creating space at intersection of two links

I have a shapefile consisting of two links which are crossing over each other. I want to create an empty space at the point of intersection of the two links. As of now, I have been manually doing ...
3
votes
1answer
402 views

Is there a commandline tool for intersecting Shapefiles?

in QGIS vectorlayers can be intersected. That is apparently done by ftools and seems to be integrated into the QGIS-program itself. That is different from many other functions that call GDAL-tools. ...