Tagged Questions

7
votes
2answers
283 views

How to create noise maps? (open source or scripted in ArcGIS)

In a previous role I helped create Noise Maps for Northern England. The predicted noise levels was done using the IMMI package (which I can recommend) and the cartographic output was done in ArcMap. ...
4
votes
2answers
199 views

Which GIS best for this problem?

This problem is similar to retail presence optimization. I'd like to know which GIS's could help us do the following: Given a set of point locations, create a circle of radius n meters around each. ...
6
votes
2answers
188 views

Looking for advice regarding solar potential applications

I have the task of looking into whether it is possible to build a solar potential application which would inform the user whether a roof is suitable for solar panels and a brief report about the ...
3
votes
1answer
360 views

Is there an open source tool for both road network analysis and geocoding?

Is there any one open source software package that can perform both road network analysis and geocoding?
8
votes
1answer
312 views

Open source GIS tool for mapping health data

Im looking for an open source desktop gis tool that can be used for visualization and exploratory analysis. I want it to be interactive and perhaps display two or more maps at the same time to allow ...
7
votes
4answers
755 views

Spatial query tool for laymen

I know nothing about GIS, but I have what I think is a GIS problem. From spending a few hours googling my problem, I think what I need to do is perform a spatial query, but I'm not sure how to go ...
5
votes
4answers
2k views

How to calculate polygon length and width using open source GIS?

How can I calculate the length and with of polygons using open source tools? By "polygon length" I mean the length of the longest line within the polygon (update: to be correct, I just need the ...
5
votes
3answers
782 views

How to interpret GRASS v.kernel results?

GRASS manual reads: v.kernel - Generates a raster density map from vector points data using a moving 2D isotropic Gaussian kernel ... Ok, but how do I interpret the results? I understand that ...
7
votes
2answers
1k views

How to calculate average slope in a grid?

This is actually a two part question: Which methods are there to calculate average slope by unit (say km²) for a given area? Are there any special requirements on the data - like additional ...