Title___ Research on Color Relief Shading Mapping based on DEM ___

Name and surname of 1st author__Zongyi He___ E-mail _zongyihe56@yahoo.com__

Organization to which author(s) belong_ Department of Cartography and GIS, School of Resource and Environmental Science, Wuhan University ___

Conference Theme considered appropriate for the contents of the presentation ___ Map Design and Production __

Other authors (name, surname and e-mail):_ Xuejuan, Sun_ sunxuejuan7122@126.com Xiuqin Wei, xq_Wei@163.com _

TEXT OF THE ABSTRACT (NO MORE THAN 400 WORDS).

Research on Color Relief Shading Mapping based on DEM

This paper discusses the theory and technology of the digital color relief shading mapping, and the theoretical framework and method for the digital relief shading. The paper introduces basic method of designing digital color relief shading, and discusses key technology of digital color relief shading, and provides scientific approaches base on relief shading mapping on DEM.

1. Colorway of relief shading mapping

By virtue of analysis and research, color in terrene relief shading according to altitude from high to low parting adopt green series transition to yellow series, anew yellow series transition to palm series, turn to lilac when it is sky-high mountains.

2. Flow of digital Relief Shading Mapping (using “Atlas3D” to make Relief Shading Mapping)

N 1:250,000 asc files (DEM)

Atlas3D combination, compress

One sdf format file

Atlas3D format conversion

One asc format file

One asc file after projection transformation

Arc/Info projection transformation, format conversion

Atlas3D format conversion

One sdf file after projection transformation

Atlas3D building shading

1:2,500,000 Color relief shading

3. Data processing of mapping projection transformation

Transform DEM file format of database to ASC file format can be straightly accepted by Atlas3D, Gauss projection is transformed to conformal conic projection.

4．Research on DEM data generalization for digital relief shading mapping

(1)Research on DEM data generalization for digital relief shading mapping by using map graphic feature.

(2) Research on DEM data generalization for digital relief shading mapping by using map picture precision

5. Determining perpendicular scale

By way of analysis and research, perpendicular scale for relatively slow trend should be relevantly bigger, perpendicular scale for hypsography evidence and upper altitude area should be smaller.

6. Put together t and synthesize technology for relief shading mapping

Research Put together and synthesize technology for relief shading mapping in the Photoshop circumstance