NGP Standards and Specifications

Lidar Base Specification Appendix 5: Well-Known Text Coordinate Reference System Examples

Lidar Base Specification 2021 rev. A

Well-Known Text (WKT) coordinate reference system examples. This appendix is from the Lidar Base Specification v. 1.3.

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Appendix 5. Well-Known Text Coordinate Reference System Examples

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Open Geographic Consortium (OGC) Well-known Text ( WKT) example with compound coordinate system

{NAD83(2011) + NAVD88 height (meters)}

Command string: $ gdalsrsinfo -o wkt “EPSG:6427+5703”

Output:

COMPD_CS[“NAD83(2011) / Colorado Central + NAVD88 height – Geoid12b”,

PROJCS[“NAD83(2011) / Colorado Central”,

GEOGCS[“NAD83(2011)”,

DATUM[“NAD83 National Spatial Reference System 2011”,

SPHEROID[“GRS 1980”,6378137,298.257222101,

AUTHORITY[“EPSG”,”7019”]],

AUTHORITY[“EPSG”,”1116”]],

PRIMEM[“Greenwich”,0,

AUTHORITY[“EPSG”,”8901”]],

UNIT[“degree”,0.0174532925199433,

AUTHORITY[“EPSG”,”9122”]],

AUTHORITY[“EPSG”,”6318”]],

PROJECTION[“Lambert_Conformal_Conic_2SP”],

PARAMETER[“standard_parallel_1”,39.75],

PARAMETER[“standard_parallel_2”,38.45],

PARAMETER[“latitude_of_origin”,37.83333333333334],

PARAMETER[“central_meridian”,-105.5],

PARAMETER[“false_easting”,914401.8289],

PARAMETER[“false_northing”,304800.6096],

UNIT[“meter”,1,

AUTHORITY[“EPSG”,”9001”]],

AXIS[“X”,EAST],

AXIS[“Y”,NORTH],

AUTHORITY[“EPSG”,”6427”]],

VERT_CS[“NAVD88 height – Geoid12b”,

VERT_DATUM[“North American Vertical Datum 1988”,

AUTHORITY[“EPSG”,”5103”]],

UNIT[“meter”,1,

AUTHORITY[“EPSG”,”9001”]],

AXIS[“Up”,UP],

AUTHORITY[“EPSG”,”5703

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OGC WKT example with compound coordinate system

{NAD83(2011) + NAVD88 height (ftUS)}

Command string: $ gdalsrsinfo -o wkt “EPSG:6434+6360”

Output:

COMPD_CS[“NAD83(2011) / Connecticut (ftUS) + NAVD88 height (ftUS) – Geoid12b”,

PROJCS[“NAD83(2011) / Connecticut (ftUS)”,

GEOGCS[“NAD83(2011)”,

DATUM[“NAD83 National Spatial Reference System 2011”,

SPHEROID[“GRS 1980”,6378137,298.257222101,

AUTHORITY[“EPSG”,”7019”]],

AUTHORITY[“EPSG”,”1116”]],

PRIMEM[“Greenwich”,0,

AUTHORITY[“EPSG”,”8901”]],

UNIT[“degree”,0.0174532925199433,

AUTHORITY[“EPSG”,”9122”]],

AUTHORITY[“EPSG”,”6318”]],

PROJECTION[“Lambert_Conformal_Conic_2SP”],

PARAMETER[“standard_parallel_1”,41.86666666666667],

PARAMETER[“standard_parallel_2”,41.2],

PARAMETER[“latitude_of_origin”,40.83333333333334],

PARAMETER[“central_meridian”,-72.75],

PARAMETER[“false_easting”,1000000],

PARAMETER[“false_northing”,500000],

UNIT[“US survey foot”,0.3048006096012192,

AUTHORITY[“EPSG”,”9003”]],

AXIS[“X”,EAST],

AXIS[“Y”,NORTH],

AUTHORITY[“EPSG”,”6434”]],

VERT_CS[“NAVD88 height (ftUS) – Geoid12b”,

VERT_DATUM[“North American Vertical Datum 1988”,2005,

AUTHORITY[“EPSG”,”5103”]],

UNIT[“US survey foot”,0.3048006096012192,

AUTHORITY[“EPSG”,”9003”]],

AXIS[“Up”,UP],

AUTHORITY[“EPSG”,”6360