坐标转换

unilee · 发表于 2010-3-29 08:11

GEOMETRIC DATA MAP PROJECTION =TM ELLIPSOID =KRASSOVSKY       DATUM =KRASSO
USGS PROJECTION PARAMETERS = 6378245.0000000000000 6356863.0187999997000
1.0000000000000       0.0000000000000       111000000.0000000000000
0.0000000000000       500000.0000000000000    0.0000000000000
0.0000000000000       0.0000000000000       0.0000000000000
0.0000000000000       0.0000000000000       0.0000000000000
0.0000000000000       USGS MAP ZONE =0
UL = 1121948.0486E 223626.4368N 636758.586 2501709.138
UR = 1142003.8335E 221855.0969N 843695.593 2472559.255
LR = 1140332.0228E 204320.3987N 818738.674 2295388.381
LL = 1120431.1673E 210033.9386N 611801.667 2324538.264
CENTER = 1131200.0000E 214000.0000N 727748.630 2398548.760 3483  2982
OFFSET =138 ORIENTATION ANGLE =-8.02
SUN ELEVATION ANGLE =38.3 SUN AZIMUTH ANGLE =145.9
ETM影像头文件里的投影参数，规定数据源的投影为克拉索夫，基准面是克拉索夫，投影坐标是墨卡托投影，请问是否四个角的控制点坐标就是在这个地理参考条件下的坐标值？
现在想求算土地面积，如果想要做投影和坐标转换，该怎么进行？
Projected Coordinate System: Krasovsky_1940_Albers
Projection: Albers
False_Easting: 0.00000000
False_Northing: 0.00000000
Central_Meridian: 105.00000000
Standard_Parallel_1: 25.00000000
Standard_Parallel_2: 47.00000000
Latitude_Of_Origin: 0.00000000
Linear Unit: Meter
Geographic Coordinate System: GCS_Krasovsky_1940
Datum: D_Krasovsky_1940
Prime Meridian: Greenwich
Angular Unit: Degree