What follows is spatial that I have found useful. It’s a mix of marine/oceanic data (especially around Florida), weather and demographics/census (esp US and world).
- Hurricane paths
- Tropical Cyclone probabilities
- GIS data layers of marine ecosystems for Florida
- Florida Fish and Wildlife
- NOAA’s dive page, with underwater obstruction data
- Loran tower locations
- Ship locations (real time)
- Inferring neighborhood boundaries from geocoded flickr photos and their metadata
- Mashup of google earth and NOAA maps for all US coasts
- Hodgepodge of google earth maps relating to oceans
- Contintental US magnetic north declination map (2004)
- Free USGS maps for download
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- It would be nice to have a way to overlay these onto google earth
- Python script to grab weather underground data
- Google Earth + US Census Data
- The UN’s data download center
- Geocoded Zip Code Data, site 1, site 2
xkcd.org
[...] All of the spatial data resources I know about reside on the spatial data page. [...]