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OpenStreetMap is moving towards the Open Database License (ODbL) License Structure "We want to change the current CC-BY-SA 2.0 to Open Database License (OdbL) 1.0. " Lots of debate has been going on for months


I believe you're correct: "If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one." Basically, the same license that permits you to obtain the data prohibits you from keeping it (not sharing). There is now a CC-BY-SA 3.0 too, but I don't immediately see the difference ...


Database Comparison Matrix In this link you can find the matrix of comparison between databases with spatial capabilities.


It is a very broad question. Cost Implementation Support Speed Limitations The bottom line is you get what you pay for. Oracle Spatial which can only be used with Oracle Enterprise Edition. One can use Oracle Locator, but has less of the native tools for GIS. Spatial also has GeoRaster which is an image format stored inside the database. The next ...


OSM legal FAQ (Common License Interpretations) mentions the difference between a Derivative Work and a Collective Work: If what you create is based on OSM data (for example if you create a new layer by looking at the OSM data and refering to locations on it) then it is likely you have created a derivative work. If you generate a merged work with ...


One thing about PostgreSQL/PostGIS is that it is the most likely candidate for having a native interface present in other open source projects. For example, in QGIS 1.4.0, there is a button sitting right in the menu bar that says "Add PostGIS Layer". Spatialite also has a toolbar entry, but there is no similar support for other databases like MySQL.


Intermap have national coverage of DSM data available via Terrain on Demand. It reportedly offers OGC compliant access on a commercial basis. ESRI also have a beta program offering a global mosaic of elevation datasets, some at 1m resolution.


I have not seen a comparison documentation at any level (comparing websites). I think that the list is long on both sides for geoportals built with COTS, and with OS mapping engines. The question fails to ask about the data being open source. If you look at COTS geoservers with WMS or other openlayer solutions it coudl get even more confusing to ask if they ...


The best option for a world map free software for me was NASA blue marble.


Went straight to the source. This was their response: Greetings, Thank you for contacting the Land Processes (LP) DAAC User Services. The general principle is one of reversibility: If someone can recover the original x-y-z values from the new product, then that new product can NOT be re-distributed. This can also be defined as lossless recovery. ASTER ...


While there are still large areas of empty space (2014), the OpenAddresses (also on GitHub here) database may be one to watch in the future. The database has been seeing steady increases of datasets, especially in the larger US metro areas. Some key highlights (as stated on the website): CC0 Licensed. Address files licensed individually. Download the raw ...


Here are two more resources: ReportAll has a fair coverage nationally of parcel data, which you could find the address info from (not free). OGRIP supplies LBRS point address data for most of the counties within Ohio (free).


Navteq supply us with point addresses data for Australia, and supply the same for many other countries (US included). It's not tremendously cheap, but is thorough, vetted, and updated quarterly. They provide the data in several different formats, from shapemaps through to generic RDBM-format. I understand Navteq get their data from the same guys that Google ...

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