# Projection Parameters

**URL:** <https://community.thinkgeo.com/t/projection-parameters/376>\
**Category:** WinForms\
**Created:** [April 22, 2009, 11:27am UTC](https://community.thinkgeo.com/t/projection-parameters/376 "2009-04-22T11:27:41Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![Charles](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/c/6f9a4e/32.png) [@Charles](https://community.thinkgeo.com/u/Charles)\
**Post date:** [April 22, 2009, 11:27am UTC](https://community.thinkgeo.com/t/projection-parameters/376/1 "2009-04-22T11:27:41Z")

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Can&nbsp;you&nbsp;provide&nbsp;a&nbsp;link&nbsp;or&nbsp;instructions&nbsp;for&nbsp;setting&nbsp;the&nbsp;parameters&nbsp;in&nbsp;proj4Projection.InternalProjectionParametersString?

In&nbsp;particular,&nbsp;I&nbsp;am&nbsp;looking&nbsp;to&nbsp;setup&nbsp;a&nbsp;projection&nbsp;for&nbsp;Polk&nbsp;County&nbsp;Wisconsin.&nbsp;&nbsp;All&nbsp;of&nbsp;Wisconsin&nbsp;appears&nbsp;to&nbsp;use&nbsp;custom&nbsp;projections.&nbsp;&nbsp;The&nbsp;projection&nbsp;values&nbsp;from&nbsp;OSGEO.ORG&nbsp;are&nbsp;as&nbsp;follows:

CS\_NAME:&nbsp;PolkWI-IF  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;DESC\_NM:&nbsp;Wisconsin&nbsp;County&nbsp;Systems:&nbsp;Polk&nbsp;County,&nbsp;International&nbsp;Foot  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;GROUP:&nbsp;OTHR-US  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SOURCE:&nbsp;Wisconsin&nbsp;Coordinate&nbsp;Systems,&nbsp;State&nbsp;Cartographer's&nbsp;Office  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;DT\_NAME:&nbsp;HPGN  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PROJ:&nbsp;TM-WCCS  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;UNIT:&nbsp;IFOOT  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PARM1:&nbsp;-92.6333333333  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PARM2:&nbsp;-28.1300  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PARM3:&nbsp;1000.0033  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SCL\_RED:&nbsp;1.00000000  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ORG\_LAT:&nbsp;44.6611111111  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;X\_OFF:&nbsp;465000.9298  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Y\_OFF:&nbsp;0.0000

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**Author:** ![Lee](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/l/bc8723/32.png) [@Lee](https://community.thinkgeo.com/u/Lee)\
**Post date:** [April 23, 2009, 8:41am UTC](https://community.thinkgeo.com/t/projection-parameters/376/2 "2009-04-23T08:41:08Z")

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Charles,&nbsp;  
&nbsp;&nbsp;  
&nbsp;There&nbsp;are&nbsp;some&nbsp;Proj4&nbsp;SRID&nbsp;and&nbsp;ParameterString&nbsp;information&nbsp;in&nbsp;the&nbsp;folder&nbsp;C:\Program&nbsp;Files\ThinkGeo\Map&nbsp;Suite&nbsp;Desktop&nbsp;Full&nbsp;Edition&nbsp;3.0&nbsp;(BETA)\Documentation\Projections,&nbsp;you&nbsp;can&nbsp;try&nbsp;to&nbsp;search&nbsp;the&nbsp;Proj4&nbsp;ParameterString&nbsp;from&nbsp;those&nbsp;projection&nbsp;files.&nbsp;I&nbsp;know&nbsp;there&nbsp;are&nbsp;some&nbsp;projections&nbsp;related&nbsp;with&nbsp;Wisconsin.&nbsp;  
&nbsp;&nbsp;  
&nbsp;Thanks,&nbsp;  
&nbsp;ThinkGeo&nbsp;Support&nbsp;

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**Author:** ![Charles](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/c/6f9a4e/32.png) [@Charles](https://community.thinkgeo.com/u/Charles)\
**Post date:** [April 24, 2009, 12:57pm UTC](https://community.thinkgeo.com/t/projection-parameters/376/3 "2009-04-24T12:57:39Z")

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Lee,

Is&nbsp;there&nbsp;nothing&nbsp;that&nbsp;shows&nbsp;the&nbsp;possible&nbsp;variables&nbsp;and&nbsp;values&nbsp;in&nbsp;the&nbsp;projection&nbsp;string?&nbsp;&nbsp;I&nbsp;would&nbsp;think&nbsp;there&nbsp;must&nbsp;be&nbsp;documentation&nbsp;somewhere,&nbsp;even&nbsp;if&nbsp;it&nbsp;is&nbsp;at&nbsp;the&nbsp;original&nbsp;source.

Charles

&nbsp;

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**Author:** ![David](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/d/aeb1de/32.png) [@David](https://community.thinkgeo.com/u/David)\
**Post date:** [April 25, 2009, 12:45am UTC](https://community.thinkgeo.com/t/projection-parameters/376/4 "2009-04-25T00:45:03Z")

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Lee,&nbsp;  
&nbsp;&nbsp;  
&nbsp;&nbsp;&nbsp;Could&nbsp;you&nbsp;please&nbsp;do&nbsp;the&nbsp;lookup&nbsp;in&nbsp;the&nbsp;Proj4&nbsp;files&nbsp;and&nbsp;some&nbsp;web&nbsp;searching?&nbsp;&nbsp;It&nbsp;will&nbsp;only&nbsp;take&nbsp;you&nbsp;a&nbsp;moment,&nbsp;quite&nbsp;being&nbsp;lazy.&nbsp;:-)&nbsp;  
&nbsp;&nbsp;  
&nbsp;&nbsp;  
&nbsp;Charles&nbsp;–&nbsp;We&nbsp;will&nbsp;do&nbsp;some&nbsp;research&nbsp;and&nbsp;see&nbsp;what&nbsp;we&nbsp;can&nbsp;find.&nbsp;&nbsp;Any&nbsp;other&nbsp;information&nbsp;you&nbsp;can&nbsp;provide&nbsp;would&nbsp;be&nbsp;invaluable.&nbsp;  
&nbsp;&nbsp;  
&nbsp;David

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**Author:** ![Lee](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/l/bc8723/32.png) [@Lee](https://community.thinkgeo.com/u/Lee)\
**Post date:** [April 28, 2009, 3:56am UTC](https://community.thinkgeo.com/t/projection-parameters/376/5 "2009-04-28T03:56:40Z")

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Charles,&nbsp;  
&nbsp;&nbsp;  
&nbsp;I&nbsp;have&nbsp;a&nbsp;look&nbsp;into&nbsp;this&nbsp;but&nbsp;with&nbsp;on&nbsp;luck.&nbsp;We&nbsp;have&nbsp;foud&nbsp;some&nbsp;projection&nbsp;ParameterString&nbsp;related&nbsp;with&nbsp;“Wisconsin”&nbsp;in&nbsp;“C:\Program&nbsp;Files\ThinkGeo\Map&nbsp;Suite&nbsp;Desktop&nbsp;Full&nbsp;Edition&nbsp;3.0&nbsp;(BETA)\Documentation\Projections\”&nbsp;  
&nbsp;EPSG.rtf,&nbsp;&nbsp;  
&nbsp;ESRI.extra.rtf&nbsp;&nbsp;  
&nbsp;ESRI.rtf,&nbsp;NAD27.rtf&nbsp;&nbsp;  
&nbsp;NAD83.rtf&nbsp;  
&nbsp;&nbsp;  
&nbsp;But&nbsp;seems&nbsp;none&nbsp;of&nbsp;them&nbsp;is&nbsp;identical&nbsp;with&nbsp;yours.&nbsp;We&nbsp;will&nbsp;spend&nbsp;more&nbsp;time&nbsp;on&nbsp;this&nbsp;and&nbsp;let&nbsp;you&nbsp;know&nbsp;what&nbsp;we&nbsp;find&nbsp;out.&nbsp;  
&nbsp;By&nbsp;the&nbsp;way,&nbsp;could&nbsp;you&nbsp;please&nbsp;let&nbsp;me&nbsp;know&nbsp;where&nbsp;do&nbsp;you&nbsp;find&nbsp;that&nbsp;projection&nbsp;information&nbsp;in&nbsp;[OSGEO.ORG](http://OSGEO.ORG)?&nbsp;  
&nbsp;&nbsp;  
&nbsp;Thanks,&nbsp;  
&nbsp;ThinkGeo&nbsp;Support&nbsp;

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**Author:** ![Charles](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/c/6f9a4e/32.png) [@Charles](https://community.thinkgeo.com/u/Charles)\
**Post date:** [May 5, 2009, 7:19am UTC](https://community.thinkgeo.com/t/projection-parameters/376/6 "2009-05-05T07:19:02Z")

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[svn.osgeo.org/metacrs/csmap/branches/12.0/CsMapDev/Dictionaries/coordsys.asc](http://svn.osgeo.org/metacrs/csmap/branches/12.0/CsMapDev/Dictionaries/coordsys.asc)&nbsp;  
&nbsp;&nbsp;  
&nbsp;CS\_NAME:&nbsp;PolkWI-F&nbsp;

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**Author:** ![Val](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/v/e56c9b/32.png) [@Val](https://community.thinkgeo.com/u/Val)\
**Post date:** [May 11, 2009, 2:23pm UTC](https://community.thinkgeo.com/t/projection-parameters/376/7 "2009-05-11T14:23:34Z")

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I&nbsp;looked&nbsp;at&nbsp;the&nbsp;documentation&nbsp;for&nbsp;Wisconsin&nbsp;County&nbsp;Coordinate&nbsp;System&nbsp;&nbsp;&nbsp;sco.wisc.edu/wiscoord/county.php&nbsp;  
&nbsp;Unfortunately,&nbsp;it&nbsp;does&nbsp;not&nbsp;explain&nbsp;about&nbsp;the&nbsp;different&nbsp;parameters&nbsp;found&nbsp;in&nbsp;the&nbsp;link&nbsp;you&nbsp;gave&nbsp;us.&nbsp;&nbsp;  
&nbsp;&nbsp;&nbsp;We&nbsp;provide&nbsp;the&nbsp;tools&nbsp;with&nbsp;Proj4&nbsp;for&nbsp;any&nbsp;projection&nbsp;needs.&nbsp;Now,&nbsp;you&nbsp;will&nbsp;need&nbsp;to&nbsp;contact&nbsp;the&nbsp;authorities&nbsp;of&nbsp;Winsconsin&nbsp;County&nbsp;Coordinate&nbsp;System&nbsp;for&nbsp;the&nbsp;specific&nbsp;info&nbsp;on&nbsp;their&nbsp;system.&nbsp;I&nbsp;think&nbsp;that&nbsp;you&nbsp;would&nbsp;need&nbsp;to&nbsp;contact&nbsp;sco.wisc.edu/about/Contact.php&nbsp;  
&nbsp;&nbsp;or&nbsp;email&nbsp;at&nbsp;sco@mailplus.wisc.edu.&nbsp;&nbsp;  
&nbsp;&nbsp;&nbsp;

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**Author:** ![Charles](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/c/6f9a4e/32.png) [@Charles](https://community.thinkgeo.com/u/Charles)\
**Post date:** [May 12, 2009, 7:00am UTC](https://community.thinkgeo.com/t/projection-parameters/376/8 "2009-05-12T07:00:12Z")

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I’m&nbsp;not&nbsp;sure&nbsp;you&nbsp;understood&nbsp;the&nbsp;original&nbsp;question.&nbsp;&nbsp;Although&nbsp;I&nbsp;am&nbsp;interested&nbsp;in&nbsp;Polk&nbsp;County&nbsp;for&nbsp;the&nbsp;current&nbsp;project,&nbsp;I&nbsp;need&nbsp;to&nbsp;understand&nbsp;the&nbsp;projection&nbsp;string.&nbsp;  
&nbsp;&nbsp;  
&nbsp;Can&nbsp;you&nbsp;provide&nbsp;a&nbsp;link&nbsp;or&nbsp;instructions&nbsp;for&nbsp;setting&nbsp;the&nbsp;parameters&nbsp;in&nbsp;proj4Projection.InternalProjectionParametersString?&nbsp;  
&nbsp;&nbsp;  
&nbsp;The&nbsp;projection&nbsp;starts&nbsp;off&nbsp;with&nbsp;+proj=&nbsp;which&nbsp;is&nbsp;the&nbsp;projection&nbsp;name.&nbsp;&nbsp;I&nbsp;have&nbsp;seen&nbsp;longlat&nbsp;and&nbsp;tmerc.&nbsp;&nbsp;Are&nbsp;there&nbsp;others?&nbsp;&nbsp;The&nbsp;entry&nbsp;+ellps&nbsp;is&nbsp;self&nbsp;explanatory,&nbsp;but&nbsp;what&nbsp;ellipsoids&nbsp;are&nbsp;handled.&nbsp;&nbsp;+units&nbsp;is&nbsp;also&nbsp;fairly&nbsp;obvious&nbsp;but&nbsp;are&nbsp;there&nbsp;other&nbsp;settings&nbsp;that&nbsp;m&nbsp;and&nbsp;f?&nbsp;&nbsp;What&nbsp;about&nbsp;survey&nbsp;feet?&nbsp;&nbsp;What&nbsp;exactly&nbsp;are&nbsp;+lat&nbsp;and&nbsp;+lon?&nbsp;&nbsp;I&nbsp;assume&nbsp;they&nbsp;are&nbsp;the&nbsp;center&nbsp;latitude&nbsp;and&nbsp;longitude,&nbsp;but&nbsp;that&nbsp;is&nbsp;not&nbsp;obvious.&nbsp;&nbsp;After&nbsp;this&nbsp;there&nbsp;can&nbsp;be&nbsp;any&nbsp;number&nbsp;of&nbsp;entries&nbsp;including&nbsp;+k,&nbsp;+x\_0,&nbsp;+y\_0,&nbsp;+no\_def.&nbsp;&nbsp;What&nbsp;do&nbsp;these&nbsp;mean&nbsp;and&nbsp;what&nbsp;are&nbsp;the&nbsp;possible&nbsp;entries?

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**Author:** ![Lee](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/l/bc8723/32.png) [@Lee](https://community.thinkgeo.com/u/Lee)\
**Post date:** [May 13, 2009, 4:20am UTC](https://community.thinkgeo.com/t/projection-parameters/376/9 "2009-05-13T04:20:02Z")

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Charles,

We&nbsp;did&nbsp;some&nbsp;investigation&nbsp;on&nbsp;TM-WCCS&nbsp;projection&nbsp;but&nbsp;there&nbsp;is&nbsp;so&nbsp;little&nbsp;information&nbsp;about&nbsp;it.&nbsp;Instead&nbsp;we&nbsp;did&nbsp;find&nbsp;how&nbsp;to&nbsp;create&nbsp;a&nbsp;Transverse&nbsp;Mercator(TM)&nbsp;PROJ4&nbsp;parameter&nbsp;string&nbsp;from&nbsp;link:&nbsp;[remotesensing.org/geotif...cator.html](http://www.remotesensing.org/geotiff/proj_list/transverse_mercator.html)

And&nbsp;you&nbsp;can&nbsp;get&nbsp;more&nbsp;description&nbsp;on&nbsp;each&nbsp;parameter&nbsp;in&nbsp;proj4&nbsp;from&nbsp;OSGEO.ORG&nbsp;documentation:&nbsp;[trac.osgeo.org/proj/wiki/GenParms](http://trac.osgeo.org/proj/wiki/GenParms)

As&nbsp;I&nbsp;know&nbsp;TM-WCCS&nbsp;is&nbsp;a&nbsp;variation&nbsp;of&nbsp;the&nbsp;traditional&nbsp;version&nbsp;of&nbsp;the&nbsp;Transverse&nbsp;Mercator&nbsp;projection,&nbsp;there&nbsp;are&nbsp;some&nbsp;minor&nbsp;differences&nbsp;between&nbsp;TM-WCCS&nbsp;and&nbsp;TM&nbsp;which&nbsp;you&nbsp;can&nbsp;find&nbsp;from:&nbsp;[docs.safe.com/fme/html/Coord...\_types.htm](http://docs.safe.com/fme/html/CoordSys/projection_types.htm)

I&nbsp;tried&nbsp;to&nbsp;create&nbsp;a&nbsp;PolkWI-IF&nbsp;parameter&nbsp;string&nbsp;by&nbsp;referencing&nbsp;above&nbsp;pages:  
  
+proj=tmerc&nbsp;  
  
&nbsp;+lat\_0=&nbsp;44.6611111111  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;+lon\_0=0  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;+k=Scale&nbsp;1.00000000&nbsp;  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;+x\_0=&nbsp;465000.9298  
  
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;+y\_0=&nbsp;0.0000  
  
&nbsp;+towgs84=-92.6333333333,&nbsp;-28.1300,&nbsp;1000.0033,0,0,0,0  
  
&nbsp;+to\_meter=0.3048006096012192

Two&nbsp;things&nbsp;I&nbsp;am&nbsp;not&nbsp;very&nbsp;sure&nbsp;are&nbsp;about&nbsp;the&nbsp;parameter&nbsp;+lon\_0&nbsp;and&nbsp;the&nbsp;unit.  
  
The&nbsp;TM-WCCSS&nbsp;projection&nbsp;does&nbsp;not&nbsp;have&nbsp;the&nbsp;ORG\_LNG&nbsp;parameter,&nbsp;so&nbsp;I&nbsp;tried&nbsp;to&nbsp;use&nbsp;0&nbsp;instead.  
  
The&nbsp;units&nbsp;supported&nbsp;by&nbsp;proj4&nbsp;are&nbsp;Meters,&nbsp;US&nbsp;survey&nbsp;feet,&nbsp;etc,&nbsp;but&nbsp;PolkWI-IF&nbsp;projection’s&nbsp;unit&nbsp;is&nbsp;IFOOT&nbsp;so&nbsp;I&nbsp;tried&nbsp;to&nbsp;use&nbsp;meter&nbsp;instead,&nbsp;and&nbsp;the&nbsp;value&nbsp;is&nbsp;referenced&nbsp;from&nbsp;a&nbsp;parameter&nbsp;string&nbsp;in&nbsp;proj4&nbsp;documentation&nbsp;for&nbsp;Wisconsin&nbsp;Central.&nbsp;&nbsp;  
  
(&nbsp;#&nbsp;NAD83(HARN)&nbsp;/&nbsp;Wisconsin&nbsp;Central&nbsp;(ftUS)  
  
\<2929\>&nbsp;+proj=lcc&nbsp;+lat\_1=45.5&nbsp;+lat\_2=44.25&nbsp;+lat\_0=43.83333333333334&nbsp;+lon\_0=-90&nbsp;+x\_0=600000&nbsp;+y\_0=0&nbsp;+ellps=GRS80&nbsp;+towgs84=0,0,0,0,0,0,0&nbsp;+to\_meter=0.3048006096012192&nbsp;+no\_defs&nbsp;&nbsp;no\_defs&nbsp;\<\>).

The&nbsp;default&nbsp;projection&nbsp;system&nbsp;we&nbsp;use&nbsp;is&nbsp;Proj4,&nbsp;which&nbsp;is&nbsp;probably&nbsp;the&nbsp;most&nbsp;used&nbsp;projection&nbsp;engine&nbsp;out&nbsp;there.&nbsp;&nbsp;I&nbsp;highly&nbsp;suggest&nbsp;that&nbsp;since&nbsp;what&nbsp;you&nbsp;are&nbsp;looking&nbsp;for&nbsp;is&nbsp;a&nbsp;Proj4&nbsp;projection&nbsp;string&nbsp;that&nbsp;you&nbsp;can&nbsp;post&nbsp;on&nbsp;the&nbsp;forum&nbsp;below.&nbsp;&nbsp;We&nbsp;are&nbsp;familiar&nbsp;with&nbsp;Proj4&nbsp;however&nbsp;we&nbsp;don’t&nbsp;claim&nbsp;to&nbsp;be&nbsp;experts&nbsp;in&nbsp;it.

Proj4&nbsp;Forum&nbsp;on&nbsp;OSGeo  
  
[n2.nabble.com/PROJ.4-f2062109.html](http://n2.nabble.com/PROJ.4-f2062109.html)

Thanks,  
  
ThinkGeo&nbsp;Support  
  
&nbsp;