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Method: NADCON
Grid Files: hawaii.las hawaii.los
Remarks: Accuracy 0.2m at 67% confidence level. Uses NADCON method which expects longitudes positive west; source and target CRSs have longitudes positive east. NADCON converts from Old Hawaiian Datum but makes the transformation appear to be from NAD27.
Information source: US Coast & Geodetic Survey www.ngs.noaa.gov
Revision date: 2004-04-27
Unit: US survey foot
Geodetic CRS: Old Hawaiian
Datum: Old Hawaiian
Ellipsoid: Clarke 1866
Prime meridian: Greenwich
Data source: EPSG
Revision date: 1999-05-24
Scope: Engineering survey, topographic mapping.
Remarks: Sometimes erroneously referred to as NAD27 / Hawaii zone 1.
Area of use: United States (USA) - Hawaii - island of Hawaii - onshore.
Coordinate system: Cartesian 2D CS. Axes: easting, northing (X,Y). Orientations: east, north. UoM: ftUS.
&stroke=red&width=2&path=18.87,-160.3|22.29,-160.3|22.29,-154.74|18.87,-154.74|18.87,-160.3)
Center coordinates
-191982.33 639729.21
Projected bounds:
-1161852.9 14352.12
761779.56 1282832.97
WGS84 bounds:
-160.3 18.87
-154.74 22.29
Definition: OGC Well Known Text 2 (2019)
BOUNDCRS[ SOURCECRS[ PROJCRS["Old Hawaiian / Hawaii zone 1", BASEGEOGCRS["Old Hawaiian", DATUM["Old Hawaiian", ELLIPSOID["Clarke 1866",6378206.4,294.978698213898, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",4135]], CONVERSION["Hawaii CS27 zone 1", METHOD["Transverse Mercator", ID["EPSG",9807]], PARAMETER["Latitude of natural origin",18.8333333333333, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",-155.5, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",0.999966667, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",500000, LENGTHUNIT["US survey foot",0.304800609601219], ID["EPSG",8806]], PARAMETER["False northing",0, LENGTHUNIT["US survey foot",0.304800609601219], ID["EPSG",8807]]], CS[Cartesian,2], AXIS["easting (X)",east, ORDER[1], LENGTHUNIT["US survey foot",0.304800609601219]], AXIS["northing (Y)",north, ORDER[2], LENGTHUNIT["US survey foot",0.304800609601219]], USAGE[ SCOPE["Engineering survey, topographic mapping."], AREA["United States (USA) - Hawaii - island of Hawaii - onshore."], BBOX[18.87,-156.1,20.33,-154.74]], ID["EPSG",3561]]], TARGETCRS[ GEOGCRS["NAD83", DATUM["North American Datum 1983", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[ellipsoidal,2], AXIS["geodetic latitude (Lat)",north, ORDER[1], ANGLEUNIT["degree",0.0174532925199433]], AXIS["geodetic longitude (Lon)",east, ORDER[2], ANGLEUNIT["degree",0.0174532925199433]], USAGE[ SCOPE["Geodesy."], AREA["North America - onshore and offshore: Canada - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon. Puerto Rico. United States (USA) - Alabama; Alaska; Arizona; Arkansas; California; Colorado; Connecticut; Delaware; Florida; Georgia; Hawaii; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Louisiana; Maine; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Montana; Nebraska; Nevada; New Hampshire; New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; Oklahoma; Oregon; Pennsylvania; Rhode Island; South Carolina; South Dakota; Tennessee; Texas; Utah; Vermont; Virginia; Washington; West Virginia; Wisconsin; Wyoming. US Virgin Islands. British Virgin Islands."], BBOX[14.92,167.65,86.45,-40.73]], ID["EPSG",4269]]], ABRIDGEDTRANSFORMATION["Old Hawaiian to NAD83 (1)", METHOD["NADCON", ID["EPSG",9613]], PARAMETERFILE["Latitude difference file","hawaii.las"], PARAMETERFILE["Longitude difference file","hawaii.los"], USAGE[ SCOPE["Transformation of coordinates at 0.2m level of accuracy."], AREA["United States (USA) - Hawaii - main islands onshore."], BBOX[18.87,-160.3,22.29,-154.74]], ID["EPSG",1454], REMARK["Accuracy 0.2m at 67% confidence level. Uses NADCON method which expects longitudes positive west; source and target CRSs have longitudes positive east. NADCON converts from Old Hawaiian Datum but makes the transformation appear to be from NAD27."]]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "BoundCRS", "source_crs": { "type": "ProjectedCRS", "name": "Old Hawaiian / Hawaii zone 1", "base_crs": { "name": "Old Hawaiian", "datum": { "type": "GeodeticReferenceFrame", "name": "Old Hawaiian", "ellipsoid": { "name": "Clarke 1866", "semi_major_axis": 6378206.4, "semi_minor_axis": 6356583.8 } }, "coordinate_system": { "subtype": "ellipsoidal", "axis": [ { "name": "Geodetic latitude", "abbreviation": "Lat", "direction": "north", "unit": "degree" }, { "name": "Geodetic longitude", "abbreviation": "Lon", "direction": "east", "unit": "degree" } ] }, "id": { "authority": "EPSG", "code": 4135 } }, "conversion": { "name": "Hawaii CS27 zone 1", "method": { "name": "Transverse Mercator", "id": { "authority": "EPSG", "code": 9807 } }, "parameters": [ { "name": "Latitude of natural origin", "value": 18.8333333333333, "unit": "degree", "id": { "authority": "EPSG", "code": 8801 } }, { "name": "Longitude of natural origin", "value": -155.5, "unit": "degree", "id": { "authority": "EPSG", "code": 8802 } }, { "name": "Scale factor at natural origin", "value": 0.999966667, "unit": "unity", "id": { "authority": "EPSG", "code": 8805 } }, { "name": "False easting", "value": 500000, "unit": { "type": "LinearUnit", "name": "US survey foot", "conversion_factor": 0.304800609601219 }, "id": { "authority": "EPSG", "code": 8806 } }, { "name": "False northing", "value": 0, "unit": { "type": "LinearUnit", "name": "US survey foot", "conversion_factor": 0.304800609601219 }, "id": { "authority": "EPSG", "code": 8807 } } ] }, "coordinate_system": { "subtype": "Cartesian", "axis": [ { "name": "Easting", "abbreviation": "X", "direction": "east", "unit": { "type": "LinearUnit", "name": "US survey foot", "conversion_factor": 0.304800609601219 } }, { "name": "Northing", "abbreviation": "Y", "direction": "north", "unit": { "type": "LinearUnit", "name": "US survey foot", "conversion_factor": 0.304800609601219 } } ] }, "id": { "authority": "EPSG", "code": 3561 } }, "target_crs": { "type": "GeographicCRS", "name": "NAD83", "datum": { "type": "GeodeticReferenceFrame", "name": "North American Datum 1983", "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 } }, "coordinate_system": { "subtype": "ellipsoidal", "axis": [ { "name": "Geodetic latitude", "abbreviation": "Lat", "direction": "north", "unit": "degree" }, { "name": "Geodetic longitude", "abbreviation": "Lon", "direction": "east", "unit": "degree" } ] }, "id": { "authority": "EPSG", "code": 4269 } }, "transformation": { "name": "Old Hawaiian to NAD83 (1)", "method": { "name": "NADCON", "id": { "authority": "EPSG", "code": 9613 } }, "parameters": [ { "name": "Latitude difference file", "value": "hawaii.las", "id": { "authority": "EPSG", "code": 8657 } }, { "name": "Longitude difference file", "value": "hawaii.los", "id": { "authority": "EPSG", "code": 8658 } } ], "id": { "authority": "EPSG", "code": 1454 } } }
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=tmerc +lat_0=18.8333333333333 +lon_0=-155.5 +k=0.999966667 +x_0=152400.30480061 +y_0=0 +ellps=clrk66 +units=us-ft +no_defs +type=crs"> <Layer srs="+proj=tmerc +lat_0=18.8333333333333 +lon_0=-155.5 +k=0.999966667 +x_0=152400.30480061 +y_0=0 +ellps=clrk66 +units=us-ft +no_defs +type=crs"> </Layer> </Map>
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