Questions tagged [open-source-gis]

Software for which the original source code is made freely available and may be redistributed with or without modification.

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142
votes
42answers
18k views

What free programs should every GIS user have installed?

Note: This question is specifically about installed, desktop software. There is another question specifically about free cloud-based software and services. What free programs should every GIS user ...
58
votes
11answers
47k views

Seeking Free and Open Source GIS Desktop packages?

Can someone give me a list of free and open source GIS desktop packages?
55
votes
10answers
40k views

Creating drive time polygons using Open Source tools?

Is anyone using open source tools and/or data to generate drive time polygons that radiate out from a given location? For example, I have used ESRI products like Network Analyst and Business Analyst ...
52
votes
5answers
3k views

How to calculate most efficient route passing through all the houses in the world?

I'm new to GIS. I need some help in determining the best or most efficient route, using a flying sleigh, through all the houses in the world. One of my coworkers told me that this site would be the ...
52
votes
3answers
17k views

Smoothing polygons in contour map?

Here is a contour map for which all the polygons of levels are available. Let ask how to smooth the polygons keeping all vertices preserved in their exact locations? Indeed the contour is made on ...
49
votes
4answers
4k views

What are the FOSS equivalents to these ArcGIS products? [closed]

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 OpenLayers, PostgreSQL, PostGIS, GeoServer and MapServer but I can't find a ...
42
votes
9answers
25k views

Open source methods for kriging?

I have a point dataset which I'd like to Krige, ideally using an open-source software package. If possible, I'd also like to choose the semi-variogram model during the process to improve the ...
37
votes
10answers
30k views

Open Source Tool capable of reading Esri File Geodatabase (.gdb)?

I have an ESRI File Geodatabase (.gdb) file that I would like to convert to shapefile (or any other non-proprietary format). Are there any Open Source tools to do so?
35
votes
12answers
11k views

Seeking alternatives to pgRouting for open source routing / network analysis?

I was wondering if there are any alternatives to pgRouting tools. Thinking about it for a bit, I think the only alternative is to use R or RPY to do the analysis. Basically I'm trying to solve ...
35
votes
5answers
43k views

Comparing different open source GIS servers?

I currently know the following open source GIS servers: Geoserver: java based, vector and bitmap support, also supports. Is now on par with mapserver (performance-wise). mapserver: c/c++, used to be ...
33
votes
10answers
6k views

How to easily shift all features in a vector dataset?

Let's say that I put together a Shapefile and all the features have their vertices shifted by a constant amount. What's the easiest way of shifting all the features (hence the (x,y) position of their ...
33
votes
7answers
4k views

Work flow for georeferencing imagery using open source tools?

Does anyone have a recommendation for a work flow for georeferencing high resolution aerial photography using open source tools? Comparison of user friendliness and robustness between Quantum GIS ...
31
votes
6answers
2k views

Convincing organization to move towards Open Source GIS? [closed]

After spending the better part of the year on this site I am seeing how big the open source GIS community is. I used to just think it was ESRI and nothing else. That said, how do you begin to nudge or ...
31
votes
5answers
3k views

Are there open source alternatives to ArcCatalog?

I'm looking for open source alternatives to ArcCatalog. The software should run on both Win and Linux and support the usual file formats (shp, kml, gml, ...) and databases (especially PostGIS, ...
27
votes
7answers
5k views

Alternatives to Network Analyst [duplicate]

I'm not sure how reasonable this question even is, but it leaves me no less curious after a bit of searching. If I am looking to build a network based on road features and attributes, is Network ...
26
votes
6answers
13k views

What is Change Detection and how I can perform such analysis with open source tools?

From wikipedia page: Change detection for GIS (geographical information systems) is a process that measures how the attributes of a particular area have changed between two or more time periods. ...
25
votes
12answers
27k views

Working with LiDAR data using other than Esri software?

I will be working with LiDAR data soon and I am wondering what the alternatives to using Esri software to do this are, including open source solutions?
25
votes
12answers
20k views

Seeking open source software package for Remote Sensing?

Here are many questions with great answers about open source GIS software. I am wondering, what is the best open source software package for Remote Sensing? I would like to learn it and to use in my ...
24
votes
8answers
34k views

Seeking open source Geocoding tool which can be used commercially?

Is there any Geocoding tool which is open source and can be used in commercial application? We tried Google geocoding API's but cannot continue with it because of some licensing limitation. Now ...
24
votes
6answers
2k views

What are some good introductory books or articles about Open Source GIS for students coming from an ESRI background? [closed]

I am preparing an intermediate GIS course for graduate and undergraduate students who have likely not been in touch with anything but ESRI software. It is an existing course in the curriculum that I ...
23
votes
7answers
1k views

GIS developer blogs … recommendations? [closed]

I'm looking for recommendations for GIS blogs ... specifically GIS developer blogs. I'm less interested in the geography than in how apps are put together. I'd like to keep up with ESRI ArcGIS as ...
23
votes
3answers
1k 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 ...
23
votes
5answers
4k views

Rendering overlapping lines

I am making a map containing information about public transportation: busses, trams, etc. The map will have a layer containing for example the tram lines. Each line has its own colour, and is ...
22
votes
5answers
12k views

A SQL console in QGIS

I know QGIS comes with its field calculator, which is not bad. It also comes with ftools which permits several operations on geometry and attributes. But we often need more control and I haven't seen ...
22
votes
2answers
3k views

Which geodatabase type is most appropriate for both open source and ESRI use?

Main Question: Is there a geodatabase type that seamlessly works with both ESRI and open source products? Details: My company currently passes around geodata in various vector and raster file ...
22
votes
4answers
6k 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 stand-...
21
votes
3answers
3k views

What are the differences between spatial databases? [closed]

What is the difference between Oracle Spatial, PostGIS, SQLServer2008, SpatiaLite, and MySQL in terms of their spatial support. Are there specific use cases where each shines. What might you want to ...
20
votes
11answers
48k views

Extracting raster values at points using Open Source GIS?

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.
20
votes
7answers
3k views

Alternatives to Shapefiles as open-source, cross platform dataset types [closed]

I am working on software that is very ESRI oriented, but a future version will likely not be using ESRI software. It uses Shapefiles and Geodatabases. I'm planning on getting all of my data to ...
20
votes
7answers
13k views

Pure JavaScript Library for Geometry Operations

Does anyone know of a pure JavaScript library for doing geometry operations such as buffer, union, intersects, etc? I want to play with doing these operations in the browser. It looks like ...
20
votes
11answers
5k views

Discontinuous or Interrupted map projections?

Do any of the current open source GIS softwares support discontinous projection systems? E.g. sinusoidal, dymaxion, butterfly, etc? If not, are there any affordable commercial ones that do (affordable ...
20
votes
4answers
13k 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 ...
19
votes
4answers
2k 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 ...
19
votes
7answers
3k 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 ...
18
votes
5answers
7k views

Splitting raster into smaller chunks using GDAL?

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 ...
18
votes
5answers
9k views

Is GIS industry always ruled by two options only, namely Esri products and OSGeo projects? [closed]

I always wonder, why in GIS industry there are merely two major options available. Although there are many other proprietary software products for GIS, their market share is well below ESRI products (...
18
votes
4answers
13k views

Free GIS software for orthorectification?

Could someone recommend a free and/or open source GIS application that can orthorectify map images?
17
votes
4answers
12k 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 ...
17
votes
4answers
946 views

Seeking advice on generic open-source package roadmap? [closed]

I just wanted to ask for advice from the open source GIS gurus on a recommended stack to use for my envisioned project, as I do not fully understand the limits of the possible with most packages. I ...
17
votes
1answer
1k views

How to detect roads from satellite images?

OpenStreetMap has announced a Bing API to detect roads. I want to know what is the theory behind road detection and if there is any open source tool that do that.
16
votes
4answers
4k 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 ...
16
votes
7answers
7k views

Free tool to simplify parcel shapefiles?

Is there any tool available which let's me run millions of parcel shapefiles and simplify them?
16
votes
2answers
18k views

What is OSGeo4W?

I have been using GIS for a few years now (ArcGIS and MapInfo). But only when I have started using QGIS I come across OSGeo4W, as there is an option to download it on the QGIS website. I have tried ...
16
votes
4answers
8k views

Calculating elevation profile along line from a DEM?

Given a DEM (Digital Elevation Model) and a line (x1,y1) --> (x2,y2) (paired coordinates (x,y)), how can one calculate the elevation profile or cross-section projected on that line? I am looking for ...
16
votes
4answers
10k 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 ...
16
votes
6answers
2k views

What's the most promising application (use) of OpenStreetMap data? [closed]

In some areas OSM data is very complete and has a level of detail not seen in closed data sources. Another distinguishing factor is that it contains the knowledge of the people who live in that areas. ...
16
votes
3answers
3k views

Is there a decent open source map-editor?

I would like to have an open source map editor for drawing a city map? I don't want to use OpenStreetMap. It will be a custom map project. I don't need an advanced GIS system, but a simple map-editor,...
15
votes
10answers
2k views

Seeking Open Source Training Materials?

The question Are Online Certs worth their weight? 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 ...
15
votes
8answers
2k views

Why choose open source software for remote sensing research? [closed]

If you judge by the amount of the questions regarding FOSS software that are being asked in GIS SE many users seems to prefer FOSS over proprietary software. I've read some articles - more precisely ...
15
votes
4answers
715 views

What's up with OpenJump?

OpenJump is a nice GIS, very functional, with many updates and has a beautiful rendering. But it's not very popular, and you don't see it around in discussions, in osgeo comunity, etc. And gis....