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创建或则打开 shapele





 !

"

"





((

(#)

*++(*+

(*+,(*+-$"."'

&&土地利用中只采用高斯克吕格

(

(,(-.)/01!&&

在土地利用矢量数据交换格式中，采用克拉索夫斯基椭球。

23#"23

"4"/

"!!!/;"

"%#:77 77 77 7887 "

4

7879

"!!/;"

"%#:77 77 77 787 "

4

7%879

"";!/

"%#:77 77 77 787 "

*=>*=?>

=!>

(*(*,

(*-#'&&

(*,(*-#'

=!>5"?!!!!!!!!!!!

=/>

(*(*,

(*-@'&&

(*,(*-@'

(*(*,

(*-

=B>5"-

=1>

(*(*,

(*-2'"'

=1>5"!

*+

*+

*+##

$A-22'"" //1

$A-('2'"" /A!

4+/7.E"'7

4+*++

4+

#%/  44) 

 "' $ 3

*+ 

&;3

3;&

((

$#$,-A,

&&&&&&&&&&&&声明结束&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&

$#F8-A

$#FG-A

$#(-A(

#@-A77

#,-A,,$

#$%-A$

#H

&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&设置  文件的基本

属性

           "  "  "

其中中间一段为设置空间参考，也可以设置为 " 参考 

创建地理坐标系统系统

"4$'$

6

((

$'#$

$'

%"%"

(%"(%",(%"

-.)/01!

33

(3(3,(3-8

'7C47

'7:4$7

'44)73%7

#%#:77 77 77 77 



H'"3#H'""#H'"3

"4"'!!!JIAKK1K

H'""#%#:77 77 77 77 "'

H'"3H'""H'""#H'"3

$%#:  44)  "' 

%"  H'""

"$'$

<

获得 ITable 中的 row

L"L"L"

"",4L" 

#(H$*

*7%H,HMH#7 4



#(H$%"$%MH

" !

<

钩子的利用：

在 开发中，可以利用钩子把  给传到由  或者  继承的命令或者

工具里，传进去的钩子就是 ，类型是一个 ，实际上就是一个 ，可以

用强制转换为 