Proceed to GeoCommunity Home Page


SpatialNewsGIS Data DepotGeoImaging ChannelGIS and MappingSoftwareGIS JobsGeoBids-RFPsGeoCommunity MarketplaceGIS Event Listings
HomeLoginAccountsAboutContactAdvertiseSearchFAQsForumsCartFree Newsletter

Sponsored by:


TOPICS
Download Data

Accounts

USGS DRGs

USGS DEMs

USGS DOQQs

FEMA Flood Data

VMAP

NWI

Gazetteer

Census/TIGER

Index Grids

About Data

Contact


SpatialNews Daily Newswire!
Subscribe now!

Latest Industry Headlines
Quad Cities Nat Geo Meetings August 10-11
SuperGIS Desktop 3.3 Updated with 3D Analyst and Better Maptile Productivity
TeleCommunication Systems Adds 14 U.S. Patents Advancing Public Safety
Toyota Chooses Telenav's Scout GPS Link and UIEvolution's UIEngine Link for Select 2016 Vehicles
FlexiCadastre Selected as Guinea’s New Mining Cadastre System
Antenova Announces Sinica - a Novel Embedded Antenna for Accurate Positioning

Latest GeoBids-RFPs
Range Survey Services-NC
Geospatial Technologies Development
GIS Support Services-WA
Digital Orthophotography-MN
A/E Services for Geo. Engineering

Recent Job Opportunities
GIS Analyst
LiDAR Project Manager

Recent Discussions
Modifying existing ArcGIS tools
vicinity maps for cad plans
.GZ File Viewing
Question/Help
Drawing GIS District Boundaries
Data HelpDesk - GIS Glossary


S
Back to Index

Scale
1) Relationship between the dimensions of a feature on a map and the geographic features they represent on the earth, commonly expressed as a fraction. For example map scale of 1:24000 means that one unit of measure on the map equals 24000 of the same unit on the earth (1 inch would equal 24000 inches =2000 feet).
2) A calibrated line, as on a map or an architectural plan, indicating such a proportion.
3) Description of how length in the real world is related to length on a map. This can be portrayed in a variety of ways including a representational fraction.

SDTS
Acronym for Spatial Data Transfer Standard for transferring data between multiple geographic data management systems. Includes metadata that addresses internal spatial reference, completeness, positional and attribute accuracy, logical consistency, completeness and data dictionary.

Spatial Data
One of the three kinds of Data (spatial, textural and image). Spatial data is categorized according to the following feature types:
Zero dimensional features: Primitive Points; topological Node.
One dimensional features: Primitive Lines, Strings (multiple nonbranching lines), arcs mathematically defined curve; topological Links, chains, and rings.
Two-dimensional features: Polygons defining enclosed areas, Pixels, and Grid Cells.

SPOT
Satellite Pour L'Observation de la Terre - the SPOT series of earth observation satellites are operated by CNES, France. SPOT 1 was launched 22 February 1986, SPOT 2 was launched 21 January 1990 and is currently operational and SPOT 3 was launched 26 September 1993 and is currently fully operational. SPOT satellites are operated in a sun synchronous near polar orbit. Satellite altitude is 830km and the repeat cycle is 26 days. SPOT 4 is proposed for launch in December 1997.

SQL
Acronym for Structured Query Language, a computer industry-standard syntax language for querying and manipulating most relational database management systems (DBMS). Commands can be embedded within a programming language to interface to a database or used interactively.

State Plane Coordinate System
System of X,Y coordinates defined by the USGS for each state. Locations are based on the distance from an origin point defined for each state.


Sponsored by:

For information
regarding
advertising rates
Click Here!

Copyright© 1995-2014 MindSites Group / Privacy Policy

GeoCommunity™, Wireless Developer Network™, GIS Data Depot®, and Spatial News™
including all logos and other service marks
are registered trademarks and trade communities of
MindSites Group