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