GADS_IM_Map_Projection_Parameters

binary record ""

size: 591

field name

definition

map_descriptor

ascii string	size: 32
Map projection descriptorone of:UNIVERSAL_TRANSVERSE_MERCATOR

samples

binary uint32	size: 4
Number of samples per line

lines

binary uint32	size: 4
Number of lines

sample_spacing

binary float	size: 4
Nominal inter-sample distance unit: "m"

line_spacing

binary float	size: 4
Nominal inter-line distance unit: "m"

orientation

binary float	size: 4
Output scene centre orientation unit: "degrees"

spare_1

binary bytes	size: 40
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hidden: true

heading

binary float	size: 4
Platform heading, degrees unit: "degrees"

ellipsoid_name

ascii string	size: 32
Reference ellipsoid name

semi_major

binary float	size: 4
Ellipsoid semi-major axis, metres unit: "m"

semi_minor

binary float	size: 4
Ellipsoid semi-minor axis, metres unit: "m"

shift_dx

binary float	size: 4
Datum shift parameter referenced to Greenwich: dx (metres) unit: "m"

shift_dy

binary float	size: 4
Datum shift parameter perpendicular to Greenwich: dy (metres) unit: "m"

shift_dz

binary float	size: 4
Datum shift parameter direction of the rotation axis: dz (metres) unit: "m"

avg_height

binary float	size: 4
average scene height above ellipsoid used for geocoding

spare_2

binary bytes	size: 12
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hidden: true

projection_description

ascii string	size: 32
Map projection alphanumeric description

utm_descriptor

ascii string	size: 32
UTM descriptorUNIVERSAL_TRANSVERSE_MERCATOR

utm_zone

ascii string	size: 4
UTM zone signature

utm_origin_easting

binary float	size: 4
Map origin, false easting unit: "m"

utm_origin_northing

binary float	size: 4
Map origin, false northing unit: "m"

utm_center_long

binary int32	size: 4
Projection centre longitude, deg unit: "1e-6 degrees_east"

utm_center_lat

binary int32	size: 4
Projection centre latitude, deg unit: "1e-6 degrees_north"

utm_para1

binary float	size: 4
1st standard parallel, deg unit: "degrees"

utm_para2

binary float	size: 4
2nd standard parallel, deg unit: "degrees"

utm_scale

binary float	size: 4
Scale factor

ups_descriptor

ascii string	size: 32
UPS descriptor

ups_center_long

binary int32	size: 4
Projection centre longitude, deg unit: "1e-6 degrees_east"

ups_center_lat

binary int32	size: 4
Projection centre latitude, deg unit: "1e-6 degrees_north"

ups_scale

binary float	size: 4
Scale factor

nsp_descriptor

ascii string	size: 32
nsp descriptor

origin_easting

binary float	size: 4
Map origin, false easting unit: "m"

origin_northing

binary float	size: 4
Map origin, false northing unit: "m"

center_long

binary int32	size: 4
Projection centre longitude, deg unit: "1e-6 degrees_east"

center_lat

binary int32	size: 4
Projection centre latitude, deg unit: "1e-6 degrees_north"

standard_parallel_parameters

binary record

size: 16

field name

definition

para1

binary float	size: 4
Standard parallel1, deg unit: "degrees"

para2

binary float	size: 4
Standard parallel2, deg unit: "degrees"

spare

binary bytes	size: 8
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hidden: true

central_meridian_parameters

binary record

size: 12

field name

definition

central_m1

binary float	size: 4
Central meridian1, deg unit: "degrees"

spare

binary bytes	size: 8
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hidden: true

projection_parameters

binary record

size: 16

field name

definition

central_m1

binary float	size: 4
Projection dependent1 unit: "degrees"

spare

binary bytes	size: 12
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hidden: true

position_northings_eastings

binary record

size: 32

field name

definition

tl_northing

binary float	size: 4
Top left corner northing, meters; unit: "m"

tl_easting

binary float	size: 4
Top left corner easting, meters; unit: "m"

tr_northing

binary float	size: 4
Top right corner northing, meters; unit: "m"

tr_easting

binary float	size: 4
Top right corner easting, meters; unit: "m"

br_northing

binary float	size: 4
Bottom right corner northing, meters; unit: "m"

br_easting

binary float	size: 4
Bottom right corner easting, meters; unit: "m"

bl_northing

binary float	size: 4
Bottom left corner northing, meters; unit: "m"

bl_easting

binary float	size: 4
Bottom left corner easting, meters; unit: "m"

position_lat_long

binary record

size: 32

field name

definition

tl_lat

binary int32	size: 4
Top left corner latitude, unit: "1e-6 degrees_north"

tl_long

binary int32	size: 4
Top left corner longitude, unit: "1e-6 degrees_east"

tr_lat

binary int32	size: 4
Top right corner latitude, unit: "1e-6 degrees_north"

tr_long

binary int32	size: 4
Top right corner longitude, unit: "1e-6 degrees_east"

br_lat

binary int32	size: 4
Bottom right corner latitude unit: "1e-6 degrees_north"

br_long

binary int32	size: 4
Bottom right corner longitude, unit: "1e-6 degrees_east"

bl_lat

binary int32	size: 4
Bottom left corner latitude, unit: "1e-6 degrees_north"

bl_long

binary int32	size: 4
Bottom left corner longitude, unit: "1e-6 degrees_east"

spare_7

binary bytes	size: 32
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hidden: true

image_to_map_coefs

binary array[8]

size: 32

8 coefficients to convert a line(L) and sample (S) position to the map projection frame of reference, say (E,N)E = A11 + A12*L + A13 *S + A14 *L*SN = A21 + A22*L + A23 *S + A24 *L*S

binary float size: 4

map_to_image_coefs

binary array[8]

size: 32

8 coefficients to convert from the map projection (E,N) to line (L) and sample(S) position in the imageL = B11 + B12*E + B13 *N + B14 *E*NS = B21 + B22*E + B23 *N + B24 *E*N

binary float size: 4

spare_8

binary bytes	size: 35
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hidden: true