Accession Number:

ADA257770

Title:

The Division of a Circle or Spherical Surface Into Equal-Area Cells or Pixels.

Descriptive Note:

Interim rept.,

Corporate Author:

PHILLIPS LAB HANSCOM AFB MA

Report Date:

1992-06-30

Pagination or Media Count:

11.0

Abstract:

The need to partition a circular area into many equally sized cells or pixels had arisen in several problems dealing with mapping phenomena within a circle. A radar picture of the horizontal extent of precipitation surrounding a station is usually of the circular area surrounding the station within approximately 192 kilometers 120 miles radius. The radar picture is conveniently analyzed by the presence or absence of a radar echo in each small cell within the circle. Since the spherical surface of the earth can be portrayed on an equal-area map, the proposed method of dividing the circle into equally sized pixels is especially applicable for detailed mapping of a spherical surface such as the northern hemisphere.

Subject Categories:

  • Cartography and Aerial Photography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE