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Ascent GIS has applications! Integrate GIS and enterprise database systems by using ArcIMS, MapObjects, ArcObjects, and ArcSDE. These types of applications support key business functions including:

Permitting
Billing
Infrastructure maintenance management
Property/asset management, etc.
Document management
Facilities management
Assessment and taxation
Emergency management
Land management
Land-use planning

The USGS, through the National Mapping Program and other mandated functions, provides geographic, cartographic, and remote sensing information, maps, and technical assistance, and conducts related research responsive to national needs.

The best known USGS maps are the 7.5 minute 1:24,000 topographic quadrangles. This is the primary scale of data produced, and depicts greater detail for a smaller area than intermediate-scale (1:50,000 and 1:100,000) and small-scale (1:250,000, 1:2,000,000 or smaller) products, which show selectively less detail for larger areas. The sheet size is approximately 22x27 inches. Each map covers an area from 49 to 64 square miles.

As a USGS business partner, Ascent GIS is a reseller of both printed and digital products that are produced by the USGS.

USGS Products

Topographic Quadrangle Maps
The USGS's most familiar product is the 1:24,000-scale Topographic Quadrangle Map. This is the primary scale of data produced, and depicts greater detail for a smaller area than intermediate-scale (1:50,000 and 1:100,000) and small-scale (1:250,000, 1:2,000,000 or smaller) products, which show selectively less detail for larger areas.

Orthophotoquads
Orthophotoquads are distortion-free aerial photographs that are formatted and printed as standard 7.5 minute, 1:24,000-scale quadrangles (15-minute in Alaska) or as quarter quadrangles at a scale of 1:12,000.

Satellite Image Maps
Experimental multi-colored or black and white image maps produced from digital data collected by Land Satellite (Landsat) and Systeme Probatoire d'Observation de la Terre (SPOT) sensors. Scales range from 1:24,000 (Point Loma, Calif.) to 1:7,500,000 (conterminous 48 States).

Thematic Maps
Maps in which information on special subjects is geographically displayed on planimetric base maps or overlays registered to planimetric or topographic base maps. This category includes land use, land cover and associated maps, as well as National Atlas maps.

Other Format Maps
This category consists of maps in non-quadrangle format. These maps include: a county map series, State base map series, U.S. base maps, a National Park series, and outline maps of the world. Scales range from 1:960 to 1:80 million.

Aerial Photographs
Aerial photographs archived and distributed by the USGS include the repository of multiagency National Aerial Photography Program (NAPP) photos at 1:40,000 scale in color infrared or black and white; National High Altitude Aerial Photography Program (NHAP) photos at 1:58,000 scale for color infrared and 1:80,000 for black and white; and aerial photos at various scales from USGS mapping projects and other Federal agencies such as the Bureau of Reclamation, Environmental Protection Agency, and the U.S. Army Corps of Engineers.

Digital Orthophoto Quadrangles (DOQ)
Digital Orthophoto Quadrangles are digital images of aerial photographs in which displacements caused by the camera and the terrain have been removed. A DOQ combines the image characteristics of a photograph with the geometric qualities of a map. The standard digital orthophoto produced by the USGS is a black-and-white or color-infrared 1-meter ground resolution quarter quadrangle (3.75-minute) image.

Photo Products Derived from Airborne and Satellite Sensor Data
These include color and black-and-white photographic products generated from Advanced Very High Resolution Radiometer (AVHRR), Side-Looking Airborne Radar (SLAR), Land Satellite (LANDSAT), and Systeme Probatoire d'Observation de la Terre (SPOT) imagery digital data.