The United States of America uses the State Plane Coordinate System (SPCS) as a system of plane rectangular coordinates that may be used for measuring ground distance and area. SPCS uses specified projections with set characteristics. In general, Transverse Mercator (TM) is used for States with predominant north-south extent and Lambert Conformal Conic (LCC) is used for States with predominant east-west extent. Other projections that may be used are Oblique Mercator (OM) in Alaska and Polyconic (PC) in Guam. The characteristics for each projection are stored in text files "nad1927.txt" and "nad1983.txt" that are provided in the $PCIHOME/etc subdirectory.
The following is a list of codes for specifying State Plane zones. The "Zone Name or Number", "Alpha Code" and "Proj Type" are for your information and are NOT to be used to specify SPCS zones. The "zone unit code" is used instead. For example, to specify the zone for Alabama, East you would set MAPUNITS to "spaf 0101" (or "SPAF 101"). The "units" can be upper or lower-case. The "zone unit code" can have (but doesn't require) leading zeros.
State Plane coordinates are only supported for NAD1927 (which uses Clarke 1866 ellipsoid) or NAD1983 (which uses the GRS 1980 ellipsoid).
The units for a given zone will be derived from the units string typed in where:
"SPAF" stands for "State Plane (U.S. Survey Feet)",
where 1.0 inch of a "U.S. Survey Foot" equals APPROXIMATELY 25.4005 mm.
(that is, 1.0 meter equals EXACTLY 39.37 inches)
"SPIF" stands for "State Plane (International Foot)",
where 1.0 inch of an "International Foot" equals EXACTLY 25.4 mm.
"SPCS" stands for "State Plane (meters)"
For NAD27, the units are "SPAF" (i.e. "State Plane (U.S. Survey Feet)"). For NAD83, the units listed are those specified by State Laws as of February 1, 1992. Although these are the suggested units, they may be overridden.
Any of the following work for the above example for NAD27. (The first example assumes NAD 1927, if no Earth model is specified.)
MAPUNITS="spaf 101" \ ELLIPS= \ MAPUNITS="spaf 101 e0" \ ELLIPS= \ MAPUNITS="spaf 101" \ ELLIPS="0" \
Any of the following work for the above example for NAD83.
MAPUNITS="spaf 101 e8" \ ELLIPS= \ MAPUNITS="spaf 101" \ ELLIPS="8" \
The following list is copied from Appendix A of the U.S.G.S. "GCTP, General Cartographic Transformation Package Software Documentation".
NAD27 NAD83
Alpha Proj zone zone
Zone Name or Number code type unit code unit code
Alabama AL
East TM SPAF 0101 SPAF 0101
West TM SPAF 0102 SPAF 0102
Alaska AK
01 OM SPAF 5001 SPCS 5001
02 TM SPAF 5002 SPCS 5002
03 TM SPAF 5003 SPCS 5003
04 TM SPAF 5004 SPCS 5004
05 TM SPAF 5005 SPCS 5005
06 TM SPAF 5006 SPCS 5006
07 TM SPAF 5007 SPCS 5007
08 TM SPAF 5008 SPCS 5008
09 TM SPAF 5009 SPCS 5009
10 LCC SPAF 5010 SPCS 5010
Arizona AZ
East TM SPAF 0201 SPIF 0201
Central TM SPAF 0202 SPIF 0202
West TM SPAF 0203 SPIF 0203
Arkansas AR
North LCC SPAF 0301 SPAF 0301
South LCC SPAF 0302 SPAF 0302
California CA
01 LCC SPAF 0401 SPAF 0401
02 LCC SPAF 0402 SPAF 0402
03 LCC SPAF 0403 SPAF 0403
04 LCC SPAF 0404 SPAF 0404
05 LCC SPAF 0405 SPAF 0405
06 LCC SPAF 0406 SPAF 0406
07 LCC SPAF 0407 ---------
Colorado CO
North LCC SPAF 0501 SPIF 0501
Central LCC SPAF 0502 SPIF 0502
South LCC SPAF 0503 SPIF 0503
Connecticut CT LCC SPAF 0600 SPAF 0600
Delaware DE TM SPAF 0700 SPAF 0700
District of Columbia DC Use LCC SPAF 1900 SPAF 1900
Florida FL
East TM SPAF 0901 SPAF 0901
West TM SPAF 0902 SPAF 0902
North LCC SPAF 0903 SPAF 0903
Georgia GA
East TM SPAF 1001 SPCS 1001
West TM SPAF 1002 SPCS 1002
Hawaii HI
01 TM SPAF 5101 SPAF 5101
02 TM SPAF 5102 SPAF 5102
03 TM SPAF 5103 SPAF 5103
04 TM SPAF 5104 SPAF 5104
05 TM SPAF 5105 SPAF 5105
Idaho ID
East TM SPAF 1101 SPAF 1101
Central TM SPAF 1102 SPAF 1102
West TM SPAF 1103 SPAF 1103
Illinois IL
East TM SPAF 1201 SPAF 1201
West TM SPAF 1202 SPAF 1202
Indiana IN
East TM SPAF 1301 SPAF 1301
West TM SPAF 1302 SPAF 1302
Iowa IA
North LCC SPAF 1401 SPCS 1401
South LCC SPAF 1402 SPCS 1402
Kansas KS
North LCC SPAF 1501 SPAF 1501
South LCC SPAF 1502 SPAF 1502
Kentucky KY
Single Zone LCC --------- SPAF 1600
North LCC SPAF 1601 SPAF 1601
South LCC SPAF 1602 SPAF 1602
Louisiana LA
North LCC SPAF 1701 SPCS 1701
South LCC SPAF 1702 SPCS 1702
Offshore LCC SPAF 1703 SPCS 1703
Maine ME
East TM SPAF 1801 SPCS 1801
West TM SPAF 1802 SPCS 1802
Maryland MD LCC SPAF 1900 SPAF 1900
Massachusetts MA
Mainland LCC SPAF 2001 SPAF 2001
Island LCC SPAF 2002 SPAF 2002
Michigan MI
East (Obsolete) TM SPAF 2101 ---------
Central (Obsolete) TM SPAF 2102 ---------
West (Obsolete) TM SPAF 2103 ---------
North LCC SPAF 2111 SPIF 2111
Central LCC SPAF 2112 SPIF 2112
South LCC SPAF 2113 SPIF 2113
Minnesota MN
North LCC SPAF 2201 SPCS 2201
Central LCC SPAF 2202 SPCS 2202
South LCC SPAF 2203 SPCS 2203
Mississippi MS
East TM SPAF 2301 SPAF 2301
West TM SPAF 2302 SPAF 2302
Missouri MO
East TM SPAF 2401 SPCS 2401
Central TM SPAF 2402 SPCS 2402
West TM SPAF 2403 SPCS 2403
Montana MT LCC --------- SPIF 2500
North LCC SPAF 2501 ---------
Central LCC SPAF 2502 ---------
South LCC SPAF 2503 ---------
Nebraska NE LCC --------- SPAF 2600
North LCC SPAF 2601 ---------
South LCC SPAF 2602 ---------
Nevada NV
East TM SPAF 2701 SPCS 2701
Central TM SPAF 2702 SPCS 2702
West TM SPAF 2703 SPCS 2703
New Hampshire NH TM SPAF 2800 SPCS 2800
New Jersey NJ TM SPAF 2900 SPCS 2900
New Mexico NM
East TM SPAF 3001 SPAF 3001
Central TM SPAF 3002 SPAF 3002
West TM SPAF 3003 SPAF 3003
New York NY
East TM SPAF 3101 SPAF 3101
Central TM SPAF 3102 SPAF 3102
West TM SPAF 3103 SPAF 3103
Long Island LCC SPAF 3104 SPAF 3104
North Carolina NC LCC SPAF 3200 SPAF 3200
North Dakota ND
North LCC SPAF 3301 SPIF 3301
South LCC SPAF 3302 SPIF 3302
Ohio OH
North LCC SPAF 3401 SPCS 3401
South LCC SPAF 3402 SPCS 3402
Oklahoma OK
North LCC SPAF 3501 SPAF 3501
South LCC SPAF 3502 SPAF 3502
Oregon OR
North LCC SPAF 3601 SPIF 3601
South LCC SPAF 3602 SPIF 3602
Pennsylvania PA
North LCC SPAF 3701 SPCS 3701
South LCC SPAF 3702 SPCS 3702
Rhode Island RI TM SPAF 3800 SPCS 3800
South Carolina SC LCC --------- SPIF 3900
North LCC SPAF 3901 ---------
South LCC SPAF 3902 ---------
South Dakota SD
North LCC SPAF 4001 SPCS 4001
South LCC SPAF 4002 SPCS 4002
Tennessee TN LCC SPAF 4100 SPAF 4100
Texas TX
North LCC SPAF 4201 SPAF 4201
North Central LCC SPAF 4202 SPAF 4202
Central LCC SPAF 4203 SPAF 4203
South Central LCC SPAF 4204 SPAF 4204
South LCC SPAF 4205 SPAF 4205
Utah UT
North LCC SPAF 4301 SPIF 4301
Central LCC SPAF 4302 SPIF 4302
South LCC SPAF 4303 SPIF 4303
Vermont VT TM SPAF 4400 SPCS 4400
Virginia VA
North LCC SPAF 4501 SPCS 4501
South LCC SPAF 4502 SPCS 4502
Washington WA
North LCC SPAF 4601 SPAF 4601
South LCC SPAF 4602 SPAF 4602
West Virginia WV
North LCC SPAF 4701 SPCS 4701
South LCC SPAF 4702 SPCS 4702
Wisconsin WI
North LCC SPAF 4801 SPAF 4801
Central LCC SPAF 4802 SPAF 4802
South LCC SPAF 4803 SPAF 4803
Wyoming WY
East (01) TM SPAF 4901 SPCS 4901
East Central (02) TM SPAF 4902 SPCS 4902
West Central (03) TM SPAF 4903 SPCS 4903
West (04) TM SPAF 4904 SPCS 4904
Puerto Rico PR LCC SPAF 5201 SPCS 5200
Virgin Islands VI LCC SPAF 5201 SPCS 5200
St. Croix LCC SPAF 5202 SPCS 5200
Guam GU PC SPAF 5400 ---------
© PCI Geomatics Enterprises, Inc.®, 2024. All rights reserved.