• What's GLOBALBASE?
  • Project
  • Architecture
  • Data Stractures
  • Protocol
• Topics
  • What's New Back Number
  • Tomorrow's Map
  • Face of GLOBALBASE
  • Books
  • What's Map?
  • Computer Science
  • Art
  • Natural Environment
  • Economics
  • Infromation Engineering
  • Innovation Japan
  • GIS
• Download
• Documents
  • ver.B Release Note
  • GLOBALBASE Guide Book
  • COSMOS Manuals
  • LANDSCAPE Manuals
  • Development
  • Bibliography
• Collection Model case
• Links
  • Companies
  • Universities & Institutes
  • Joint Research
  • NPOs
  • Others

---

p4m.xl (Creating mappings of 4 points or more)

Author: Hirohisa Mori / joshua@globalbase.org + [Transrate]Reiko Inoue Bendtsen c/o Suzaku Translations / (http://www.suzaku-translations.com/) +

---

PROTOTYPE

xl p4m.xl / [p4m-file]

ARGUMENTS

[p4m-file] Mapping file containing only point-map and meta data

Option

• reverse= none/src/dest The default is none .
  Support from ver.B.b16.05 and later.

ENVIRONMENT

Agent xl [UNDEF REF (xl)], Agent netmapper [UNDEF REF (netmapper)]

EXPLANATION

In mappings involving 4or more corresponding points, it is not possible to match the coordinates via linear transformation. For this reason, this command uses a complementary method, where the entire map region is divided into multiple triangular areas ( so-called TINs) and a different linear transformation is applied inside each TIN. Moreover, it is necesary to specify an approximate linear transformation for infinite distances so that a transformation can be applied to points placed at infinity in the coordinate systems. Although it is possible to specify these parameters and create a mapping file manually, it is usually easier to generate the mapping file automatically by specifying corresponding points and running the p4m.xl script.

In LANDSCAPE ver.B.b16.05 and later, a new reverse option has been added. If the axis directions of the mapping source and mapping destination are different, the reverse option is required. The reverse option is used to specify a mathematical coordinate system ( x-axis direction from left to right, y-axis direction up) relative to a computer coordinate system ( x-axis direction from left to right, y-axis direction down). For example, if the mapping source is a mathematical coordinate system, specify reverse=src. If the mapping destination is a mathematical coordinate system, specify reverse=dest. If both the mapping source and destination are mathematical coordinate systems, specify reverse=none.

First, create a file with the extension p4m. Basically, any extension except for map can be used. The structure of a p4m file is the same as that of a map file and contains point-map and meta data only. The first 3points can be considered as a map file, and the 4thpoint and onward can be considered as appended point-map data. Thus, if you already have a mapping file where a mapping of up to 3points has been specified, and you consider adding a 4thpoint to it, you can simply add the 4thpoint and rename the file extension to .p4m to create a p4m file. The example below shows the contents of a p4m file for a single system ( Kyushu).

	
<?xml version="1.0" encoding="EUC-JP"?>
<map>
 <meta>
  <file type="xl"/>
  <src>
   xlp://isjhp2.nichibun.ac.jp:8080/kokudo/coord/01.crd
  </src>
  <dest>
   xlp://isjhp2.nichibun.ac.jp:8080/kokudo20000/coord/00.crd
  </dest>
  <dp>
   181
  </dp>
 </meta>
 <point-map>
  b1
  <list>
  6577.435059m
  30896.992188m
  </list>
  <list>
  146482.000000m
  1294111.625000m
  </list>
 </point-map>
 <point-map>
  b2
  <list>
  -16864.001953m
  34593.703125m
  </list>
  <list>
  149568.734375m
  1315266.750000m
  </list>
 </point-map>
 <point-map>
  b3
  <list>
  -20587.638672m
  81065.656250m
  </list>
  <list>
  189254.359375m
  1318867.375000m
  </list>
 </point-map>
 <point-map>
  b4
  <list>
  3998.532959m
  12131.631836m
  </list>
  <list>
  130398.726563m
  1296403.500000m
  </list>
 </point-map>
 <point-map>
  b5
  <list>
  -38258.191406m
  24350.640625m
  </list>
  <list>
  140765.75000m
  1334532.000000m
  </list>
 </point-map>
 <point-map>
  b6
  <list>
  -15451.980469m
  56954.250000m
  </list>
  <list>
  168696.531250m
  1314098.375000m
  </list>
 </point-map>
</map>
 

Now save this contents in a file called and run the following script.

% xl p4m.xl - - / 01.p4m
 

Running the script generates the file, with the same name as the original except that the extension is changed to .map. However, this new file is a distributable mapping file in which TIN and infinite distance linear transformations are specified. The file contains the following.

<map>
 <meta>
  <file type="xl"/>
  <src>
   xlp://isjhp2.nichibun.ac.jp:8080/kokudo/coord/01.crd
  </src>
  <dest>
   xlp://isjhp2.nichibun.ac.jp:8080/kokudo20000/coord/00.crd
  </dest>
  <dp>
   181
  </dp>
 </meta>
 <horizontal-affen>
  <List>
   <List>
    0.002363 
    0.854563 
   </List>
   <List>
    -0.901667 
    0.004435 
   </List>
  </List>
  <List>
   120044.569714 
   1299925.616167 
  </List>
 </horizontal-affen>
 <point-map>
  ^"1"
  <list>
   -127929.444336 
   -125736.416992 
  </list>
  <list>
   12292.601562 
   1414717.750000 
  </list>
 </point-map>
 <point-map>
  ^"2"
  <list>
   -38258.191406m 
   24350.640625m 
  </list>
  <list>
   140765.750000m 
   1334532.000000m 
  </list>
 </point-map>
 <point-map>
  ^"3"
  <list>
   -127929.444336 
   218933.705078 
  </list>
  <list>
   306835.000000 
   1416246.250000 
  </list>
 </point-map>
 <triangle-map>
  ^"1"
  ^"2"
  ^"3"
 </triangle-map>
 <triangle-map>
  ^"2"
  ^"3"
  ^"1"
 </triangle-map>
 <triangle-map>
  ^"3"
  ^"2"
  ^"1"
 </triangle-map>
 <point-map>
  ^"4"
  <list>
   6577.435059m 
   30896.992188m 
  </list>
  <list>
   146482.000000m 
   1294111.625000m 
  </list>
 </point-map>
 <point-map>
  ^"5"
  <list>
   96248.687988 
   218933.705078 
  </list>
  <list>
   307364.656250 
   1214112.375000 
  </list>
 </point-map>
 <point-map>
  ^"6"
  <list>
   96248.687988 
   -125736.416992 
  </list>
  <list>
   12822.257812 
   1212583.750000 
  </list>
 </point-map>
 <triangle-map>
  ^"4"
  ^"5"
  ^"6"
 </triangle-map>
 <triangle-map>
  ^"6"
  ^"4"
  ^"5"
 </triangle-map>
 <triangle-map>
  ^"5"
  ^"4"
  ^"6"
 </triangle-map>
 <point-map>
  ^"7"
  <list>
   3998.532959m 
   12131.631836m 
  </list>
  <list>
   130398.726563m 
   1296403.500000m 
  </list>
 </point-map>
 <triangle-map>
  ^"1"
  ^"7"
  ^"6"
 </triangle-map>
 <triangle-map>
  ^"7"
  ^"6"
  ^"1"
 </triangle-map>
 <triangle-map>
  ^"6"
  ^"7"
  ^"1"
 </triangle-map>
 <point-map>
  ^"8"
  <list>
   -20587.638672m 
   81065.656250m 
  </list>
  <list>
   189254.359375m 
   1318867.375000m 
  </list>
 </point-map>
 <triangle-map>
  ^"5"
  ^"8"
  ^"3"
 </triangle-map>
 <triangle-map>
  ^"3"
  ^"8"
  ^"5"
 </triangle-map>
 <triangle-map>
  ^"8"
  ^"3"
  ^"5"
 </triangle-map>
 <triangle-map>
  ^"2"
  ^"8"
  ^"3"
 </triangle-map>
 <triangle-map>
  ^"3"
  ^"2"
  ^"8"
 </triangle-map>
 <triangle-map>
  ^"5"
  ^"8"
  ^"4"
 </triangle-map>
 <triangle-map>
  ^"8"
  ^"4"
  ^"5"
 </triangle-map>
 <triangle-map>
  ^"1"
  ^"2"
  ^"7"
 </triangle-map>
 <triangle-map>
  ^"2"
  ^"7"
  ^"1"
 </triangle-map>
 <triangle-map>
  ^"7"
  ^"4"
  ^"6"
 </triangle-map>
 <triangle-map>
  ^"6"
  ^"7"
  ^"4"
 </triangle-map>
 <point-map>
  ^"9"
  <list>
   -15451.980469m 
   56954.250000m 
  </list>
  <list>
   168696.531250m 
   1314098.375000m 
  </list>
 </point-map>
 <triangle-map>
  ^"9"
  ^"2"
  ^"8"
 </triangle-map>
 <triangle-map>
  ^"9"
  ^"8"
  ^"4"
 </triangle-map>
 <point-map>
  ^"10"
  <list>
   -16864.001953m 
   34593.703125m 
  </list>
  <list>
   149568.734375m 
   1315266.750000m 
  </list>
 </point-map>
 <triangle-map>
  ^"2"
  ^"7"
  ^"10"
 </triangle-map>
 <triangle-map>
  ^"9"
  ^"2"
  ^"10"
 </triangle-map>
 <triangle-map>
  ^"9"
  ^"10"
  ^"4"
 </triangle-map>
 <triangle-map>
  ^"7"
  ^"10"
  ^"4"
 </triangle-map>
</map> 

Once this file is recognized by the server, the mapping is completed.
% xl makefile.xl - -


[UP] Go To Page Top

RETURN VALUE

None

ERRORS

REFERENCE

BUGS

[UP] Go To Page Top

Copyright©