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This imagery illustrates the 30cm pixel resolution, historical (1960s) orthophotography produced for the U.S. Department of Agriculture (USDA) - Natural Resources Conservation Service (NRCS) by Aero-Graphics. The ortho product provided is Grayscale, 8-bit per pixel and delivered in USGS 1:12k quarter quad tiles (with a 100m buffer) in LZW compressed GeoTIFF format. This orthophotography is published in Universal Transverse Mercator Zone 20N, NAD83, meters, EPSG:26920. Source aerial photography was collected between 1963 and 1967 at a scale of 1:20,000 . Due to the nature of the flightlines in this project, it was impossible to create tiles that encompassed a single flight date. Therefore, the dates assigned to each image tile were derived from the imagery that comprises the majority of the tile. However, systematic differences in radiometry do exist between some adjacent orthophotos and between adjacent flight lines due to different conditions at the time of exposure (date of capture, flight direction, sun angle). No color or histogram matching was attempted and pixel values within these orthomosaics closely match the original pixel values captured during the scanning process.
Purpose: Rectified orthophotography for the State of Puerto Rico may serve as a basemap for GIS applications.
Creation Date: 01011963 - 12311967
Publication Date: 20240724
Revision Date:
Refresh Cycle: Updated periodically as new imagery becomes available
Version: 1.0.0
Change Log: Service Deployed
This imagery illustrates the 30cm pixel resolution, historical (1960s) orthophotography produced for the U.S. Department of Agriculture (USDA) - Natural Resources Conservation Service (NRCS) by Aero-Graphics. The ortho product provided is Grayscale, 8-bit per pixel and delivered in USGS 1:12k quarter quad tiles (with a 100m buffer) in LZW compressed GeoTIFF format. This orthophotography is published in Universal Transverse Mercator Zone 20N, NAD83, meters, EPSG:26920. Source aerial photography was collected between 1963 and 1967 at a scale of 1:20,000 . Due to the nature of the flightlines in this project, it was impossible to create tiles that encompassed a single flight date. Therefore, the dates assigned to each image tile were derived from the imagery that comprises the majority of the tile. However, systematic differences in radiometry do exist between some adjacent orthophotos and between adjacent flight lines due to different conditions at the time of exposure (date of capture, flight direction, sun angle). No color or histogram matching was attempted and pixel values within these orthomosaics closely match the original pixel values captured during the scanning process.
Purpose: Rectified orthophotography for the State of Puerto Rico may serve as a basemap for GIS applications.
Creation Date: 01011963 - 12311967
Publication Date: 20240724
Revision Date:
Refresh Cycle: Updated periodically as new imagery becomes available
Version: 1.0.0
Change Log: Service Deployed