0
votes
0answers
20 views

Overlay Shapefile and Raster layer in R [duplicate]

I have a raster layer with climate data from the north of Mexico, part of Canada and the US mainland. I am trying to restrict the climate data to only the zone of the US mainland. To do this I thought ...
0
votes
1answer
45 views

How to simplify shapefiles without losing attributes?

I want to simplify a huge shapefiles using mapshaper. However whenever I simplify the shapefile I loose a lot of data attributes. how can we simplify the shape files while retaining at least some of ...
0
votes
1answer
47 views

Want to get an SHP file for my coutry Algeria

H everyone , i'm running a clustering test on my country with R, but the problem the clustering doen't look good because of the map i have, i hant to get a bigger map of my country 'ALGERIA' in an SHP ...
2
votes
2answers
249 views

Problem with merging and dissolving a shapefile in R

I am migrating from ArcMAP to opensource GIS. I've succesfully installed R and many packages in a Ubuntu 12.04 machine. I am used to linux and programming in C, but not to R and its syntax. I am ...
0
votes
0answers
43 views

Newbie, I want to make a map that shows something along the lines of the following:

What is the average income for housing units (middle, mixed, family, etc.) within a 2 mile radius of parks for the City of Anaheim? or What is the average number of parks within the 1/2 mile radius ...
0
votes
1answer
127 views

How to map and color localities (provinces) with an external CSV using Quantum GIS

I use a Swiss shape file map (called PLZO_PLZ) available on http://www.cadastre.ch/internet/cadastre/fr/home/products/plz/data.html (ZIP file Shape LV03) PLZO_PLZ contains a column called PLZ which ...
0
votes
1answer
50 views

Calculate length of 2,000 paths - lines in Google Earth?

I have ~2,000 paths/lines drawn in Google Earth and I would like to know their cumulative length. How can I do this easily? I have been able to convert into excel the Lat & Long of each point in ...
0
votes
1answer
124 views

How to symbolize features in QGIS?

Why is a shapefile shown as coloured independent features in ArcGIS shown in a single colour in Quantum GIS? What can I do to display this layer (wwf ecoregions) with the different ecoregions ...
5
votes
1answer
2k views

R : convert a spatial polygon objet to spatial polygon data frame

My goal is to modify an existing shapefile by merging certain polygons. After importing the shapefile and using the UnionSpatialPolygons command, I get the polygon outline that I want. However, this ...
3
votes
2answers
1k views

Can QGIS automatically load an SLD with a Shapefile?

I have SLD's/lyr files with my shp/gdb files. They all have the same name except for the extension. Is it possible for me to force qgis to load the sld with the shp so that I don't need to manually go ...
5
votes
2answers
1k views

Retain ESRI symbology in Mapinfo TAB

Is there anyway to retain/easily transfer symbology from ESRI to Mapinfo? The only process I found was posted in 2010 - https://groups.google.com/group/mapinfo-l/browse_thread/thread/883223ff4ae56809 ...