GIS学习笔记（二）
Arc: projectdefine grid
oddem 从这儿起才是老师讲的内容
Warning: Coordinate system definition
exists.
Only those characteristics specified will be
changed.
Define Projection
Project: projection
utm utm的，名称
Project: units
meters
单位
Project: datum
wgs84
大地坐标
Project: zone
47
带
Project:
parameters
可省略为param
在oddem下生成了prj.adf文件
Arc: describe
oddem 看看改后是什么样子
Description of Grid oddem
Cell Size
=
15.000
Data
Type:
Integer
Number of
Rows
=
1025
Number of Values
=
1390
Number of Columns
=
1025
Attribute Data (bytes)
=
8
BOUNDARY STATISTICS
Xmin
=
732142.861
Minimum Value
=
334.000
Xmax
=
747517.861
Maximum Value
=
1723.000
Ymin
=
2203497.018
Mean
=
749.163
Ymax
=
2218872.018
Standard Deviation
=
299.164
COORDINATE SYSTEM DESCRIPTION 有了投影坐标
Projection
UTM
Zone
47
Datum
WGS84
Units
METERS
Spheroid
WGS84
Parameters:
Arc:
project 投影转换wgs84-->Indian1954
Usage: PROJECT <COVER |
FILE> <input>
<output> {projection_file}
Usage: PROJECT GRID
<input>
<output> {projection_file}
{NEAREST | BILINEAR | CUBIC} {out_cellsize} {x_register}
{y_register}
这下help有用了，查project命令，Subcommands-->datum(各种大地坐标)-->Table1-11-->Asia-->INDIAN1954
大地坐标 名称 使用的椭球体
Indian1954 INF_A
忘了
Arc: project grid oddem oddemlao
**************************************************
*
The INPUT projection has been
defined.
*
**************************************************
Use OUTPUT to define the output projection and END
to finish.
Project:
output
从output开始，到end结束
Project: projection utm
Project: units meters
Project: datum
inf_a
这个看起来很专业吧
Project: zone 47
Project: param
Project: end
Inversibility is 100 per cent
Project...
生成了老挝坐标下的DEM
Arc: lg
Workspace:
F:\CAO
Available GRIDs
-------------------
ODDEM
ODDEMLAO
有两个图层了，就是后边这个
Arc: describe oddemlao
Description of Grid oddemlao
Cell Size
=
15.000
Data
Type:
Integer
Number of
Rows
=
1025
Number of Values
=
1390
Number of Columns
=
1025
Attribute Data (bytes)
=
8
BOUNDARY STATISTICS
Xmin
=
732485.614
Minimum Value
=
334.000
Xmax
=
747860.614
Maximum Value
=
1723.000
Ymin
=
2203184.597
Mean
=
749.163
Ymax
=
2218559.597
Standard Deviation
=
299.164
COORDINATE SYSTEM DESCRIPTION
Projection
UTM
Zone
47
Datum
INF_A
不一样了吧
Units
METERS
Spheroid
EVEREST
Parameters:
Arc:
grid
要去生成等高线了
Copyright (C) 1982-2006 Environmental Systems Research Institute,
Inc.
All rights reserved.
GRID 9.2 (Sun Sep 17 16:05:34 PDT 2006)
Grid:
contour
就用contour命令
Usage: (C) CONTOUR
(<grid>,
<INTERVAL>,
<interval>,
{base})
等差数列等高线
Usage: (C) CONTOUR
(<grid>,
<LIST>, <z, z, ...,
z>)
任意指定
Grid: odcont =
contour(oddem,interal,100)
Unknown keyword: INTERAL
Grid: odcont =
contour(oddem,interval,100)
生成等高线
Contouring ... 100%
Grid:
lc
有了，oddem对应的odcont
Workspace:
F:\CAO
Available Coverages
-------------------
ODCONT
Grid: odcontlao = contour(oddemlao,interval,100)
Contouring ... 100%
Grid: lc
Workspace:
F:\CAO
Available Coverages
-------------------
ODCONT
ODCONTLAO
oddemlao对应的odcontlao
Grid:
project
Usage: (*) PROJECT
(<grid>, {projection_file}, {NEAREST
| BILINEAR | CUBIC},
{out_cellsize}, {x_register, y_register})
Grid: arc
Usage: ARC <arc_command>
{arguments...}
Grid: quit
Leaving GRID...
Arc: project cover odcontlao
odcontwgs 将odcontlao的大地坐标再换回来
Please define the input and output map projections.
Use INPUT to define the input projection, OUTPUT
to define the output projection, and END to finish.
Project:
input
先就业，后择业
Project: projection utm
Project: units meters
Project: datum inf_a
Project: zone 47
Project: param
Project: output
Project: projection utm
Project: units meters
Project: datum wgs84
Project: zone 47
Project: param
Project: end
Arc: listcoverage
Submitting command to Operating System ...
'listcoverage' 不是内部或外部命令，也不是可运行的程序
或批处理文件。
Arc:
listcoverages
显示矢量文件，就是lc吧
Workspace:
F:\CAO
Available Coverages
-------------------
ODCONT
ODCONTLAO
ODCONTWGS
Arc: 要检查是否重合，去界面环境下
