Lambert - SPCS 1927 Lat-Long-> X Y SPCS 1927 Conversion...

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SPCS 1927 Lat-Long -> X, Y Page 1 SPCS 1927 Conversion Formulae Convert from Lat/Long to X,Y Using the Clark 1866 Ellipsoid D.MMSSssss Point (HP Calc. format) Latitude 35°. 00' 00'' ∙000 N Longitude 75°. 00' 00'' ∙000 W Standard     N 45°. 00' 00'' ∙000 N Parallels     S 33°. 00' 00'' ∙000 N Origin Latitude 23°. 00' 00'' ∙000 N Longitude 96°. 00' 00'' ∙000 W Origin meters US Survey feet X offset 0 0 Y offset 0 0 Using the conformal latitude method (as per formulae) meters US Survey feet X =  1,894,410.899 6,215,246.424 Y =  1,564,649.472 5,133,354.142 k =  0.997 0171 0.997 0171 Using the geocentric latitude method (as per the tables) meters US Survey feet X =  1,894,410.689 6,215,245.737 Y =  1,564,645.245 5,133,340.274 k =  0.997 0171 0.997 0171 User Instructions Enter the required data in the boxes with the red border. You can use either meters or US Survey feet for the offsets. Enter latitudes and longitudes in
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SPCS 1927 Lat-Long -> X, Y Page 2 D.MMSSssss (HP calculator) format, and the entry will be formatted in a  more readable form. Data returned are the co-ordinates of the entered point, in meters of feet, together with the point scale factor at the latitude of the point in the. boxes with the green borders. Note that two methods of obtaining co-ordinates are used. The 'geocentric latitude' method is what was used in the old SPCS 1927 tables, and so will give a result that is closer to old values. The 'conformal latitude' method is based on more exact formulae and should be used if you are sure that the full computation was done for the SPCS 1927 co-ordinates. You will see that there isn't a great deal of difference between the co-ordinates obtained. Consult Snyder's 'Map Projections - A Working Manual' for more details on this issue. © 1998 Bill Hazelton and OSU. This spreadsheet may be distributed freely, provided that no charge is made, or any attempt is made to profit by it. All rights are reserved by the copyright holders.
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This note was uploaded on 07/17/2008 for the course GS 608 taught by Professor Brzezinska during the Spring '06 term at Ohio State.

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Lambert - SPCS 1927 Lat-Long-> X Y SPCS 1927 Conversion...

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