| Main Title |
Exploring the effects of vector to raster and raster to vector conversion |
| Author |
Congalton, Russell G. ;
Schallert, D. M.
|
| Other Authors |
|
| CORP Author |
California Univ., Berkeley. Dept. of Forestry and Resources Management.;Environmental Monitoring Systems Lab., Las Vegas, NV. |
| Publisher |
U.S. Environmental Protection Agency, Center for Environmental Research Information, |
| Year Published |
1992 |
| Report Number |
EPA/600/R-92/166 ; OV-0291-NAEX |
| Stock Number |
PB93-122166 |
| OCLC Number |
37396060 |
| Subjects |
Geographic information systems
|
| Additional Subjects |
Geographic information systems ;
Data conversion ;
Computer graphics ;
Digital maps ;
Remote sensing ;
Polygons ;
Accuracy ;
Raster format ;
Vector format
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| ELBD |
EPA 600-R-92-166 |
|
AWBERC Library/Cincinnati,OH |
04/10/1998 |
| NTIS |
PB93-122166 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
{vi}, 48 p. : ill. ; 28 cm. |
| Abstract |
Spatial data can be represented in two formats: raster (grid cell) or vector (polygon). It is inevitable that conversion of the data between these two formats be essential to the best use of the data. Most geographic information systems (GIS) now provide software for such a conversion. The objective of the study was to evaluate the effects of data conversion on the accuracy of the resulting data layer. Simple shapes were chosen to document the results of the raster to vector and vector to raster conversion processes. These shapes included a square, a triangle (not aligned with the grid), a circle, a hole within the circle, and a non-convex shape. Error matrices were employed to represent the changes in area through the conversion process. A second set of data including a circle, a thin rectangle, and a wide rectangle were used to examine the effects of grid cell size on both presence/absence of a feature as well as maintaining the feature's shape. Finally, recommendations for continuing the work and its application to information derived from remotely sensed data were presented. |
| Notes |
"September 1992." "EPA/600/R-92/166." "UCB P.O. # OV-0291-NAEX." "Technical monitor, R.S. Lunetta." Includes bibliographical references. |
