Description:The 2010 New Hampshire aerial photography project was designed to produce statewide 1' (.3m) GSD multispectral digital orthoimagery. The project was executed under two USGS GPSCII contract task orders (Contract # G10PC00026). Task order G10PD01086 (non-ARRA funded) consisted of the southern portion of the state (6,530 5k tiles below y coordinate value 475,000'). Task order G10PD00842 (ARRA funded) consisted of the northern portion of the state (4,268 5k tiles above the y coordinate value of 475,000').
Imagery was acquired for approximately 66% of the state, extending from the southern boundary through most of Grafton and Carroll Counties, in 2010. The remainder of the state, (3455 tiles) of the north task order, was postponed until 2011 due to weather-related issues.
An orthoimage is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation have been mathematically removed, thus it combines the image characteristics of a photograph with the geometric qualities of a map.
The leaf-off imagery was collected in the spring of 2010/fall of 2011 under conditions free from clouds and cloud shadows, smoke, fog, haze, light streaks, snow, ice on water bodies, foliage, flooding, and excessive soil moisture. The sun angle threshold was 30 degrees. The imagery consisted of panchromatic, blue, green, red and near infrared bands. The three color bands and near infrared bands were pan sharpened and archived as frame imagery. All 4 bands were used in the orthophoto production. Here, the bands are arranged in a RGB composite.