Software for which the original source code is made freely available and may be redistributed with or without modification.
6
votes
6answers
2k views
Web-map with mouse-over effect
under photoshop, I have different layers, each representing a region and a background which the country.
I would like to make an animated map for the web, that is when the mousse is over a region, it ...
6
votes
7answers
2k views
Extract raster values at points
How can I extract values from a raster by points. I prefer not in Arcgis. I prefer in Qgis or Mapwindow or other open source gis.
6
votes
6answers
4k views
Is there a comprehensive list of latitude and longitude values for cities around the world?
I'm developing an application that calculates the distance between cities using their respective Longitude and Latitude values.
But the problem is where to get a comprehensive list of latitude and ...
6
votes
3answers
2k views
Get all vertices of a polygon using OGR and Python
I'm having a little trouble with the Python OGR API. What I am trying to do is get all the coordinates of each vertex of the outer ring of a polygon.
This is what I have so far:
import osgeo.ogr
...
6
votes
1answer
210 views
Open Source solutions for building a Traffic Management System
I am trying to set an Open Source alternative to proprietry ITS (Intelligent Transportation Systems) The goal is to build a Traffic Management System for a middle size city center. Main requirements ...
6
votes
2answers
306 views
How to compute the routing through N addresses/coordinates?
I have a set of N coordinates (addresses). My goal is to compute the shortest driving route through the set of coordinates, where the algorithm (not the user) decides which of the N coordinates should ...
6
votes
1answer
511 views
Spatial joins in OGR SQL
I have seen that OGR supports it's own form of SQL, I was wondering if it's possible to do spatial joins.
Something like select all objects where one intersects the other. I did have a look around ...
6
votes
1answer
480 views
FOSS method to split raster into smaller chunks
I have a raster (USGS DEM actually) and I need to split it up into smaller chunks like the image below shows. That was accomplished in ArcGIS 10.0 using the Split Raster tool. I would like a FOSS ...
6
votes
3answers
540 views
Can we use GeoExt Freely?
I want to know, can we use GeoExt freely? is there any need to purchase some license for using GeoExt ?
Actually i am already working with free Open source tools (OpenLayers+GeoServer) for my webMap ...
6
votes
1answer
477 views
Open source engine that is similiar to ArcEngine
If I was to develop a mapping application to be a standalone windows app, is there an open source engine that is somewhat comparable to ArcEngine?
6
votes
4answers
595 views
Looking for open source component to create PDF from WMS in a web application
I want to create a PDF from WMS in a web map application.
Please can anyone recommend a robust component? I'd like free open-source under an relatively business-friendly licence (no GPL, BSD/MIT ...
6
votes
2answers
187 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 ...
6
votes
1answer
590 views
Open source tool for point/node conflation/matching?
The Question
Are there any open source tools for conflating (matching) two layers of point (node) data?
Motivation
I'm particularly interested in using such a tool to sync data with OpenStreetMap, ...
6
votes
1answer
334 views
Is there a GeoDjango tutorial for GeoRSSFeeds?
I'm going through GeoDjango basics right now. Ideally, I'd like to publish a GeoRSS from a set of data I have that is already in Django's database. I know how to get a regular Feed working, but when I ...
6
votes
1answer
137 views
Looking for open source software similiar to ESRI City Engine
I am looking for open source software similar to ESRI City Engine and currently going through open source software directory.
Update :
About ESRI City Engine (Quick introduction)
We want to make ...
5
votes
4answers
1k views
Large mosaic process failing - what are the options? software independent only focussed on result
I need to mosaic about 550Gb of tif imagery together and the software I have tried keeps failing. The area has been split into zones so that the smallest has approx 200 tiles.
I have used the latest ...
5
votes
3answers
472 views
Looking for a .NET Dijkstra component using Shapefile
I'm totally new to stackexchange and i'm in this beautiful informative place for one problem.
I'm a .net programmer and i need to write a program that reads a shapefile and performs routing operation. ...
5
votes
3answers
780 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 ...
5
votes
2answers
248 views
Are there GIS tools for simulating landscape fragmentation?
I am currently looking for any GIS packages (or add-ons) that allow the simulation of landscape fragmentation on raster data. Maybe also other software than GIS tools?
Does anyone of you have had ...
5
votes
2answers
261 views
How to deal with multitype data sources in QGIS?
Today I was trying to import a DXF to Qgis, the result is that qgis displays everything LINES and POINTS but it only displays options for the POINT objects.
When I try to export to a shapefile, it ...
5
votes
3answers
2k views
Free MobileGIS like ArcPAD
I'm looking for open-source program like ArcPAD.
I have read all questions and answers, but i find nothing. I need the program for PDA (Dell axim x51v + GPS modul) and I want mapping points (trees or ...
5
votes
1answer
303 views
Which Open Source GIS application support Linear Referencing and Dynamic Segmentation?
I'm looking for an Open Source GIS application that supports Linear Referencing and Dynamic Segmentation for the development of a road inventory system. I already know about GRASS but I'd like to know ...
5
votes
3answers
1k views
Dissolve or unsplit lines on common attributes in QGIS or other OSS
I have a road centerline Shapefile that has roads split at every intersection, however I'd like to join LINESTRINGs that have a common set of attributes into a single LINESTRING. So long as the name, ...
5
votes
3answers
1k views
Create 3D dxf with OGR
Does anyone know if it's possible to create a 3D dxf with OGR. I would like to assign our contour lines a z value and export them to dxf for some cad work.
PS I know FME can do this, however I would ...
5
votes
2answers
679 views
Quickly create contour polygons from cost points using OSS for web app
This is related to a previous question I've asked:
Create filled contour map with GRASS
I've created a point layer using OpenStreetMap data and pgRouting's driving_distance() function, where the ...
5
votes
4answers
818 views
Looking for a fast, open-source raster cost-distance function to use in code
I've been scouring the internet for a fast, open-source cost-distance function that I can embed inside my code. The functionality should basically work like the ArcGIS implementation where I can ...
5
votes
2answers
196 views
3D snapping in open source platforms
I'm looking for tools and extensions in open source platforms (gvSIG, QGIS, uDig, etc) that allows 3D snapping.
In the last years, most of the projects my company is working on required the editing ...
5
votes
1answer
325 views
Is there an open source tool to planarize graphs?
I read about the planarize function in ArcGIS, which seem to do exactly what I want. Is there a similar feature in QGIS or another free tool?
I have a shapefile with various shapes intersecting each ...
5
votes
1answer
307 views
Open source location allocation modelling
I'm looking for open source tools for location allocation modelling (eg planning public health facilities). Preferably in a GIS environment. I know GRASS somewhat, but v.net.alloc doesn't seem to ...
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
2answers
320 views
select by attribute on shapefiles with open-source python modules
I usually use ArcGis 9.3.1, but when running a python script that includes Select_by_attribute (from gp), the script runs very very slowly. Is there a way I can perform a select-by-attribute on a ...
5
votes
2answers
144 views
What are my options for Server side clustering using open source GIS tools?
I need to make a webapp that will show over 40K Points on a map. These points are all across the globe. Using WFS Service and OpenLayers, it is possible to do clustering on small set of points, but ...
5
votes
1answer
109 views
Looking for open-source solution to show map with massive objects(3x3 polygon) on a web site
I don't have much experiance in GIS systems.
I am developing a web site which need to show a map with 3m x 3m rectangles for a radius of about 400 meters.(about 58,000 polygons for one location)
I ...
5
votes
1answer
477 views
Memory leak in ArcGIS aggregate points/buffer/Addfield/cursor
I am starting to have concerns about the ability of ArcGIS 10 to fulfill a deliverable of mine. It got me to wondering what exactly else there is, that can perform similar functionality?
ET ...
5
votes
0answers
121 views
How to add shapefile name as attribute during merge? [duplicate]
Possible Duplicate:
How to add field with filename when merging shapefiles with ogr2ogr?
I have more 200 shapefiles with a unique name. I would like to merge all of these together and save ...
4
votes
3answers
203 views
Open source database of world locations [duplicate]
Possible Duplicate:
Comprehensive list of Latitude and Longitude values of cities round the world
i would like to know if is out there any downloadable database of world locations,
i know ...
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.
...
4
votes
4answers
227 views
Looking for web and desktop tools with GML support
I am a graduate student and a novice in GIS field. I have few GML files that contain vector polygon data and I want to see them in a map format. The problem is that I do not have access to ...
4
votes
3answers
1k views
How to calculate orientation of line segments using open source GIS?
I'd like to calculate the orientation of line segments relative to north direction using open source tools. Which tools or functions would you recommend?
4
votes
2answers
439 views
Workflow in ArcGIS 10
Our agency has collabrated with six townships and one city for preparing an inventory of stormwater network.
We are using ArcGIS 10 (2 ArcView licenses) and ArcPad 7.1 (stuck with it since our ...
4
votes
3answers
326 views
Do any open-source .Net libraries (commercially usable) exist for reading/writing LiDAR data?
I have a few LiDAR point data (.las files) with me. I would like to read the X,Y and Z from it using .Net. I found liblas, which is in C++ and I am not sure if it can be used commercially after ...
4
votes
2answers
217 views
How to efficiently project datasets of varying coordinate systems into one coordinate system?
I am working on streamlining data processing at my organization. Currently we are using various large-scale Models that we will gradually bring into Python.
The gist of our data processing is as ...
4
votes
2answers
2k views
How to create a WMS Service to display a geo-reference image
I currently have little experience in the opensource area and I'm guessing this is where I need to go if I want to create a WMS Service without needing ArcGIS Server. Basically my goal is to take a ...
4
votes
1answer
1k views
Best way to visualize Google Maps and Mapinfo (or SHP or SQLite) at the same time?
I am having a bunch of Mapinfo data of a large area. This data has multiple layers and is also available as SHP, and of course it could be easily converted to SQLite ("SpatiaLite"). Although probably ...
4
votes
1answer
869 views
OpenLayers Style Question … not working in IE
I'm trying to use OpenLayers to produce a map I'm using the following to style a layer in the map.
It seems to work fine in Firefox but I get javascript error in IE 'symbolizer' is null or not an ...
4
votes
3answers
95 views
How to print from arcpad without buying more ESRi sofware?
I am running ArcPad 10 in windows 7 on a laptop and on a field unit consisting of an Ashtech MobileMapper 10 as a PDA talking to an SXBlue GPS. This system provides the real time half meter (without ...
4
votes
2answers
375 views
How to animate raster time series using open-source GIS?
I have a bunch of rasters taken about 10 minutes apart, and I have a nice QGIS project that produces pretty enough maps of them. I'm wondering if there's a way to animate this raster series, with a ...
4
votes
2answers
603 views
How to cut a shape file?
I want to use a shape file of the Corine Land Cover. This covers all of Europe, but I am only interested in the area of Scandinavia.
How can I cut this file using free software (preferably a ...
4
votes
2answers
389 views
Which are the best open source tools/solutions for digitizing road networks?
I was thinking on tools/plugins for QGIS, but other good suggestions are welcome.
4
votes
3answers
480 views
gvSIG advantages
Direct comparison between software may not be the best thing to do but as I can't arrive at a conclusion thought of asking here. Is there any gvSIG user in this GIS community? Looking at the ...
