#REAL WORLD EXAMPLE OF ALTITUDE GEOMETRY FREE#

Black-and-white panchromatic (B/W) film primarily consists of a black-and-white negative material with a sensitivity range comparable to that of the human eye.

There are several different types of film commonly used in aerial photography.

Low-oblique - Shows only the surface, the horizon is not show.Д®arly aerial photography was film based and remained the dominant medium throughout the 20th century until the development of digital cameras.

High-oblique -Shows the surface, the horizon, and a portion of sky.

There are two types of oblique photographs: ObliqueДЄny aerial photographs taken at an angle are known as oblique photographs. Vertical photograph are often used in cartography and photogrammetry. Vertical (or nearly) angle to the ground surface, i.e. Vertical photographs are taken looking straight down. Most of the air photos we use in remote sensing are vertical photographs. Types of Aerial Photography Angle of PhotoДЄerial photographs may be taken in vertical, low-oblique or high-oblique positions. NAIP imagery has a resolution of 1-meter ground sample distance (GSD). A primary goal of the NAIP program is to make digital ortho photography available to governmental agencies and the public within a year of acquisition. Starting in 2003 the National Agriculture Imagery Program (NAIP) and acquiring aerial imagery during the agricultural growing seasons in the continental U.S.

The NAPP photos include black-and-white and color infrared images and all images have a scale of 1:40,000 (1 inch equals about 0.6 miles). The National Aerial Photography Program (NAPP) program began in 1987 as a replacement for NHAP, with the objective of acquiring complete uniform photo coverage of the conterminous 48 States over a 5 to 7 year period. The NHAP collection includes black-and-white aerial photographs at a scale of 1:80,000 and color infrared aerial photographs at a scale of 1:58,000

#REAL WORLD EXAMPLE OF ALTITUDE GEOMETRY FREE#

The goal of the program was to provide cloud free aerial images of the entire lower 48 states.

The National High Altitude Program (NHAP) was an interagency federal effort coordinated by the USGS which operated from 1980 to 1989. Later the National Aerial Photography Program (NAPP) and the National Digital Orthophoto Program (NDOP) were created to take a more imagery of farm lands on a national scale and provide consistent coverage. The earliest aerial photography in 1937 by USGS and Farm Security Agency. Department of Agriculture (USDA) has been involved in the acquisition, use and distribution of aerial photography for more than 65 years. Aerial photography has numerous applications and is used by catographers, engineers and scientists to analyze everything from urban expansion to the impacts of climate change. The first non-military aerial photography programs were developed in the 1930's as part of the Agricultural Adjustment Act. The military potential of aerial photography was obvious and aerial photography was widely used in WWI and WWII. Aerial photography quickly expanded with advances in aeronautics. It can also provide a historical perspective that allows us to view changes in landscapes overtime.ДЄs we learned earlier in this course, the first aerial photographs were taken from balloons, kites and even pigeons. While the quality, resolution and platforms have evolved, aerial photography is still a cornerstone of remote sensing and is becoming cheaper and more accessible than ever.ДЄerial photography is useful both for regional analysis and for evaluating specific sites. Since its inception, aerial photography has gone from balloons and kites, to airplane, satellites and now unmanned aircraft systems (UAS). Before the development of multispectral sensors and computers, people were using traditional photography to capture aerial images. Aerial photography is one the earliest forms of remote sensing and is still one of the most widely used and cost effective methods of remote sensing.

Real world example of altitude geometry