Navigation Center RSS Feeds for Local Notices to Mariners (LNMs) for each Coast Guard District. These feeds are update automatically as soon as we publish the latest LNM for each districts.
Currently monitored by Tripwire.
A Python module which makes it easy to carry out GIS related operations. Look up coordinates of addresses, locations, and landmarks. Has a geocoding function. Can calculate distance between two points on the globe. Pretty straightforward to use.
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A free, publically referrable, publically editable street map of the world, generated out of data contributed by the people who live there.
A map dataset in the public domain. Multiple scales of resolution available (1:10m, 1:50m, 1:110 million). Vector and raster images. Incorporates GIS attributes for mapmaking. Designed to make it easy to develop maps on your own. Comes as ArcMap MXD and QGIS documents. You can also download entire databases (even SQLite) all in one go.
A protocol for encoding geographic locations in a way other than latitude/longitude coordinates. Ideal for places that don't have addresses, like when you're hiking or urbex. 6 or 10 character codes. Crisis response applications. Not case sensitive. Generated from lat/long coordinates. The closer two locations are, the more similar the OLCs are. 10 character codes more accurate than 6 character codes. It's possible to drop characters off the end to encode larger areas. Should be compatible with both Google Maps and Open Streetmaps.