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a*********n
发帖数: 1331 | 1 census data作了projection (projected coordinate system)之后，这是metadata的
信息，有问题吗？我是project to projected coordinate system，可是为什么"
extent" 或"bounding coordinates"却是geographic coordinate system? 而且我
create centroids也还是经度纬度的数。可是我需要projected coordinate system
Horizontal coordinate system
Projected coordinate system name: NAD_1983_StatePlane_New_Jersey_FIPS_2900_
Feet
Geographic coordinate system name: GCS_North_American_1983
Details
Map Projection Name: Transverse Mercator
Scale Factor at Central Meridian: 0.999900
Longitude of Central Meridian: -74.500000
Latitude of Projection Origin: 38.833333
False Easting: 492125.000000
False Northing: 0.000000
Planar Coordinate Information
Planar Distance Units: survey feet
Coordinate Encoding Method: coordinate pair
Coordinate Representation
Abscissa Resolution: 0.000000
Ordinate Resolution: 0.000000
Geodetic Model
Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257222
_________________
Bounding coordinates
Horizontal
In decimal degrees
West: -76.227599
East: -76.227598
North: 38.820670
South: 38.820669
In projected or local coordinates
Left: -74.255654
Right: -74.112913
Top: 40.788433
Bottom: 40.673958 |
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