|Table of Contents|

Application of DEM to Calculating the Surface Area of Forest Land(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2006年01期
Page:
86-90
Research Field:
Publishing date:

Info

Title:
Application of DEM to Calculating the Surface Area of Forest Land
Author(s):
WANG Xiuyun~
1,2),CHEN Ye~1,ZHOU Houhua~3,ZHANG Qiang~1
Keywords:
Nanjing c ity;  DEM;  forest land;  surface area;  secant
PACS:
S757.2
DOI:
-
Abstract:
U sing Nan jing city as a case study, this paperm a inly introduces the use of DEM ob tained from contour by d ig itizing the relie fm ap, and the use of gr id them es, which has the same reso lution ( 100m ) as DEM, for the forest land o fN an jing to calcu late surface area o f d iffe rent forest land a t d ifferent slope grades based on GIS. In o rder to finish ca lculating the surface area, slope and secan t should be obta ined at first. Slope can be extracted from DEM au tom atically. Secant can be obta ined from slope inform ation. Comb ined w ith the slope, the forest land and the secant inform ation tog ether, the study w as fin ished to ca lcu la te the surface area o f d ifferen t fo rest land a t different slope g rades. Com paring the surface areaw ith the vertical pro jection area, we can draw a conc lusion that the research on DEM can prov ide the sound support o f ca lculating the fo rest land resources due to G IS.

References:

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Last Update: 2013-04-29