National Agriculture Imagery Program
Through the National Agriculture Imagery Program (NAIP), the US Department of Agriculture's Farm Service Agency acquires 1-meter aerial imagery covering the United States. The "leaf on" imagery is collected during agriculture growing seasons. It is frequently newer than other easily-available imagery (Yahoo, Bing) and can therefore be used for mapping recent changes.
In some areas (at least parts of Texas) Bing serves NAIP imagery.
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WMS
For the JOSM WMS Plugin, the possible WMS url are
http://isse.cr.usgs.gov/ArcGIS/services/Combined/SDDS_Imagery/MapServer/WMSServer?request=getmap&version=1.1.1&format=image/png&srs=EPSG:4326&layers=0&styles=default& http://isse.cr.usgs.gov/ArcGIS/services/Combined/USGS_EDC_Ortho_NAIP/MapServer/WMSServer?request=getmap&version=1.1.1&format=image/png&srs=EPSG:4326&layers=0&styles=default& http://isse.cr.usgs.gov/ArcGIS/services/Combined/USGS_EDC_Ortho_NAIP/MapServer/WMSServer?request=GetMap&version=1.1.0&format=image/jpeg&service=WMS&layers=0&STYLES=default&
2010 imagery was added in May 2011.
TMS
MapQuest
MapQuest has their OpenAerial tileset, mostly based on NAIP imagery. It's not necessarily the latest imagery;
A JOSM-format URL:
http://oatile1.mqcdn.com/naip/{zoom}/{x}/{y}.png
Telascience
As of May 2011, final 2010 imagery is available and is also accessible via:
http://cube.telascience.org/tilecache/tilecache.py/NAIP_ALL/{zoom}/{x}/{y}.png
This is not always the latest imagery (example: the official NAIP server and MapQuest show more progress than Telascience on the US 54 expressway at Osage Beach, Missouri).
Raw
The USDA's Geospatial Data Gateway makes available downloadable county-wide image mosaics of NAIP imagery, other DOQs, DRGs, etc. Unfortunately, they are distributed in proprietary formats (MrSID, JPEG2000) and will require involved conversion before use in most software.
See also
- USGS High Resolution Orthoimagery
- National Agricultural Imagery Program - on Wikipedia
- NAIP - NAIP Imagery information page at USDA FSA
