GRANIT Resource Library

GRANIT is pleased to announce that 2010/2011 aerial photography covering the entire state of New Hampshire is now available for distribution. While the initial plan was to collect all imagery in the fall of 2010, the contractor was unable to fly the northern part of the state in that year due to weather conditions. However, the northern region was flown in the fall of 2011, and was processed and available for distribution by the spring of 2012. Click here for a map showing the footprint collected in each year.

The data comprises 1-foot resolution, leaf-off, 4-band imagery. It is being distributed in 5000’ x 5000’ tiles, which are available as geotiffs (~98 MB/tile) and/or as compressed sids (~5 MB/tile). (Please note that the .sid files do not contain the 4th band - the CIR band - due to limitations of the LizardTech software used to generate them.) Project-level, FGDC-compliant metadata is available for those wishing to learn more about the data capture or processing. (Tile-level metadata is distributed with the data.) GRANIT has also prepared a brief overview describing basic options for displaying the 4-band data in ArcGIS 10.

GRANIT is providing the following mechanisms for accessing the data:

Download town-based zip files of the compressed (.sid) tiles from the GRANIT ftp site. The tile index shapefile is also available on this site (see 2010PhotoIndex_1Ft). As referenced above, the .sid tiles are 3-band images and do not include the CIR band.
Order full set of available geotiffs on external hard drive - see GRANIT pre-packaged products order form.
Access the imagery via the Web Mapping Service (WMS)
Contact GRANIT for information on other custom options.

To estimate your storage requirements per town for the 1-foot resolution imagery, click here. (Note that this table reports storage requirements by town, and will overstate requirements of multi-town regions due to shared tiles.)

In addition to the 1-foot imagery, 6" resolution imagery was captured for a number of towns in the state. The WMS service provides access to this data as well.

Please contact GRANIT for further information on accessing these data.

Financial support for the 2010 aerial photography program was provided by the NH Departments of Transportation, Safety, and Revenue Administration, and the US Geological Survey. GRANIT staff assisted in defining the project technical requirements, in securing federal funding for the project, and in archiving and distributing the imagery.