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The Geo-Wiki Platform

The Geo-Wiki Platform

Geo-Wiki is a platform which provides citizens with the means to engage in environmental monitoring of the earth by providing feedback on existing spatial information overlaid on satellite imagery or by contributing entirely new data. Data can be input via the traditional desktop platform or mobile devices, with campaigns and games used to incentivize input. Resulting data are available without ...

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GIS Data Repositories

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This list of data repositories was compiled by Karen Payne of the University of Georgia’s Information Technologies Outreach services, with funding provided by USAID, to point to free downloadable primary geographic datasets that may be useful in international humanitarian response. The repositories are grouped according to the tabs at the bottom of the sheet There are 17 groups of repositories. ...

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Accuracy Precision and Resolution Of GIS Data

Accuracy Precision and Resolution Of GIS Data

When collecting data that will be used in a geographic information system (GIS), it is important that you record it properly. In order to do this, you need to understand the difference between accuracy, precision and resolution. This short video provides a brief and easy to understand introduction to these concepts using target-shooting as an analogy.

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Top 10 Reasons to Share Your Data with ArcGIS Open Data

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Releasing your open data means much more than making a file download site to meet government transparency requirements. Publishing your data as open data makes your community and the whole world a better place to live. Open data enriches the programs and applications created by software developers. It stimulates local, regional, national, and international economies. Open data is eradicating polio ...

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Free GIS Datasets

Robin Wilson, a PhD student at the University of Southampton made a very interesting page that contains a categorised list of links to over 300 sites providing freely available geographic datasets – all ready for loading into a Geographic Information System. He said in his website : I kept coming across GIS datasets online that looked like they might be useful – for my ...

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Convert shapefiles to geoJSON via web interface

Convert shapefiles to geoJSON via web interface

This is a nice web interface for converting Shapefiles to geoJSON, the preferred format of vector geodata on the web. And yes, you can also convert back from geoJSON to ESRI Shapefile. Check it out: http://ogre.adc4gis.com/ geoJSON is plain text format that stores geometries and attributes in a standardized and human readable way (read the docs: http://geojson.org/). It is often ...

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SimpleGeo Public Spaces free Data

SimpleGeo Public Spaces free Data

From SimpleGeo : “We’re very excited to announce that the SimpleGeo’s CC0 Places data set is now available for download at no cost. If you’d like to get your hands on 21M+ POIs that cover 63 countries, we’re ready to hand that over to you in one file. The file is about 2GB in .ZIP format, and remember, with the ...

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Geofabrik.de : Les données OpenStreetMap téléchargeables en Shapefiles

Openstreetmap

  Geofabrik.de met à disposition du public les données OpenStreetMap au format Shapefile. Les couches (sous license Creative Commons – Share Alike) sont téléchargeables gratuitement, et librement redistribuables dans tous vos projets. La taille des fichiers varie de quelque dizaine de mégaoctets pour une emprise régionale, à quelque giga pour un continent. Les fichiers compressés contiennent plusieurs couches : Buildings, ...

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