Software for which the original source code is made freely available and may be redistributed with or without modification.
11
votes
1answer
299 views
automating roof orientation detection from satellite imagery
A while ago I did a neighbourhood roof orientation survey for solar panel deployment, by visually checking each roof and marking individually whether they were south or almost south-facing.
As this ...
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, ...
31
votes
6answers
3k views
Free GIS workshops, tutorials, and applied learning material
Note 1: Please enter answers separately or feel free to edit this post directly
Note 2: Please report on any broken links so they can be removed
This thread lists free as in $0 workshops in GIS and ...
9
votes
3answers
1k views
Is there a Python Lib for requesting WMS/WFS and saving as image/PDF?
i am wondering whether there's Python open-source GIS lib which has APIs to support call WMS/WFS from another GIS server (e.g., GeoServer) and then save the response data(WMS Basemap and WFS layer) as ...
12
votes
4answers
623 views
Python module to delete SHP features (without Desktop GIS installed)
I have a piece of software (not Arc) that runs nightly on a non-production machine which updates shapefile features from an external database. Periodically I would like to delete all of the features ...
8
votes
5answers
518 views
Looking for a Metadata Editor
Looking for a free open source metadata editor for the development of an enterprise database. It will mostly be used for documenting shapefiles and GeoTIFFs. Hoping that it will be an intuitive ...
4
votes
2answers
395 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
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 ...
19
votes
4answers
485 views
How to generate schemas of GIS hardware / software / workflows?
Quite often I find myself in a situation where I need to explain hardware or software GIS infrastructure to people with no or limited knowledge of GIS. Or give an overview of geoprocessing tasks ...
8
votes
1answer
283 views
What options are available for free Web Processing Service (WPS) client?
A number of products seem to be implementing the server side of the OGC Web Processing Service (WPS 1.0.0) and these are listed here.
However, for the client side there are fewer options.
Has ...
7
votes
3answers
487 views
How to script shapefile editing with open source tools?
I would really like not to disturb anybody and find my answer by a Google search, but I don't really know where to start.
I have a .shp vector layer with several points on streets, each having a list ...
5
votes
1answer
327 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 ...
3
votes
1answer
110 views
Are there any alternatives to ArcGIS Locator Report?
I'm a pretty new GIS programmer and I've found ArcGIS/Arcpy to be extremely unstable. I'm trying to run a Locator Report in arcpy with no success.
I'm wondering if there are any other alternatives? ...
3
votes
3answers
164 views
What FOSS GIS has the option to link attribute tables to rasters
In ArcGIS rasters can have attribute tables. What FOSS GIS offers a similar option?
5
votes
2answers
326 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 ...
6
votes
4answers
603 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
1answer
485 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 ...
5
votes
2answers
688 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 ...
13
votes
9answers
667 views
Open Source Training Materials
This recent question made me wonder if there are any open source training materials for GIS.
By this I don't mean training specifically for open source software - of which I know there are some - ...
14
votes
4answers
2k views
How to create a simple front-end for a PostGIS database?
My organisation collects a lot of environmental monitoring data (stream flow, water chemistry etc.) most of which is currently stored in Excel. I’d like to get everything into a database – probably ...
16
votes
1answer
728 views
Is there an open source GIS to view and edit CityGML models?
I'm looking for an open source GIS that supports viewing and editing of CityGML models.
So far, I've found a list of open source applications that support CityGML, but they all seem to be ...
2
votes
3answers
327 views
Looking for map calibration software and city database
I'm in need of a mapping software which, given a map, lets you calibrate it (choose which geographic coordinates project to which pixels on the map image) and then given a database of cities, you can ...
10
votes
2answers
2k views
How do dissolve polygons from shapefile using open source tools?
In my current project I'm visualizing data on a map representing some values for each administrative areas of a country. I'm given a shapefile of this country, which I'm converting to GeoJSON for use ...
1
vote
1answer
788 views
How to connect GeoServer with Java to a PostGIS/PostGres database?
I am having trouble using GeoServer to perform a shortest path analysis between two network points. My question is about connecting GeoServer with Java to a PostGIS/PostGres database.
I know that in ...
35
votes
4answers
1k views
What are the FOSS equivalents to these ArcGIS products?
I'm a long-term user of ESRI software, and I now have a need to use free and open source software.
I've been reading about Open Layers, PostgreSQL, PostGIS, GeoServer and MapServer but I can't find ...
7
votes
1answer
495 views
Visual Studio Lightswitch and spatial data
I'm looking for a way to handle spatial data (for instance geography data type in SQL Server 2008) in Visual Studio Lightswitch 2011.
Preferably with an extension that can show data on a map. So far ...
5
votes
3answers
476 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. ...
2
votes
1answer
184 views
Get Cell Value Webservice for ArcGIS Raster (LiDAR) without using ArcGIS
I want to expose the getCellValue function on Lidar Data, as a web service. But I don't have access to ArcGIS (server or desktop).
What options do I have to fetch cell value, given lat lon, from a ...
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 ...
13
votes
7answers
1k views
Fastest way to spatially join a point CSV with a polygon Shapefile
I have a 1 billion point CSV file and a shapefile with around 5,000 polygons. What would be the fastest way to spatially join points and polygons? For each point, I need to get the containing polygon ...
4
votes
1answer
789 views
How to create a polygon from other polygon boundaries?
I want to write an algorithm that creates a polygon inside a hole made by a set of other polygons. It's something like a flood fill and it's like the "boundary" tool in Autocad.
The image shows an ...
19
votes
3answers
580 views
Are there any OpenSource ArcObjects Projects?
One of the major benefits of developing GIS applications based on opensource libraries, is that many projects spring up on top of them which are also opensource.
Well designed opensource projects ...
1
vote
1answer
155 views
Is Orbit EOS Lite Free GIS Map Server an OpenSource software?
I'm writing an essay about web mapping software and I can't find out is Orbit EOS Lite Free GIS Map Server an OpenSource software or not? Also, I would be thankful if someone gives me some links with ...
2
votes
1answer
319 views
Scripting in GRASS
Can anyone suggest me web-links to learn scripting in GRASS GIS (its utilities, examples etc.) other than those available in GRASS official Wiki/Sites?
7
votes
1answer
2k views
Is there a free and open-source MXD to SLD converter? [duplicate]
Possible Duplicate:
How to edit or convert ArcGIS 10 layer style to a SLD’s file
I'm trying to set up a web map server for one of the government agencies in my country. Server setup's done ...
5
votes
2answers
262 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 ...
1
vote
2answers
515 views
accessing mapinfo data without using mapinfo api
I need to be able to access various mapinfo layers but without using the mapinfo api.
I have found that I can convert the mapinfo layers to an access database to get the attribution and I can use ...
4
votes
3answers
482 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 ...
12
votes
3answers
637 views
Open Source Map Composing Tool
Are there any open source tools which can be used for map composing, preferably GUI based. I use Quantum GIS sparingly but I am interested to know if there are others. The tool must be able to read ...
6
votes
1answer
521 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 ...
8
votes
3answers
1k views
Land Cover Feature Extraction from Satellite Imagery
I'm interested in a low-cost or open source solution for creating land cover GIS layers that utilize both spectral and textural extraction algorithms. I have used PCI Geomatica, ENVI, and Feature ...
8
votes
2answers
545 views
Most suitable open source GIS platform
I'm looking for an open source GIS server or desktop package that supports as many file formats as possible, is fast, runs on Linux or Mac and can be controlled via an API.
Planning to do very basic ...
7
votes
4answers
758 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 ...
3
votes
2answers
140 views
How to bring polygons closer to a point?
I have some scattered polygons with a lot of space between them.
I want to make a thematic map but all that white space doesn't look very good, so I want to bring the polygons closer to the center of ...
5
votes
1answer
313 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 ...
10
votes
9answers
1k views
What is a good Javascript web API (preferably open) for building web maps that require little/no maintenance?
I have recently volunteered to make a web map for a local non-profit. The map will be pretty basic. It needs to display Lane county, Oregon split into multiple districts, with a "central office" ...
10
votes
3answers
3k views
Post Processing GPS Data with open source software
I am using Magellan Professional Mapper CX working on ArcPad 7.1 platform. It has sub-meter accuracy after post processing. Without post processing the data collected in the field is off by 10 to 15 ...
10
votes
3answers
718 views
Polygons from Polylines in either ArcView or FOSS
I have 20,000 polylines in a .gdb that represent about 5,000 building footprints. Some of the building footprints have pretty substantial gaps (image below). I would like to snap the polylines closed ...
6
votes
3answers
541 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 ...
2
votes
4answers
2k views
GIS newbie, How to georeference a jpeg metro map using OSS?
I have a metro map in jpeg format and I want to georeference it. My goal is to find GPS location of the metro stops and visualize them on google maps. Probably, the first step is to overlay the map ...
