GS50 projection

{{Short description|Conformal map projection}}

File:GS50 projection.png

File:GS-50 projection with lines of constant scale.svg

GS50, also hyphenated as GS-50,{{cite journal

| last1 = Snyder

| first1 = John Parr

| year = 1987

| title = Map Projections: A Working Manual

| url = https://pubs.usgs.gov/pp/1395/report.pdf

| format = PDF

| publisher = United States Geological Survey

| accessdate = 8 December 2023

| pages = 205

| journal = Professional Paper

| volume = 1395

}} is a map projection that was developed by John Parr Snyder of the USGS in 1982.

The GS50 projection provides a conformal projection suitable only for maps of the 50 United States. Scale varies less than 2% throughout the area covered. Distortion is very low as well. It is not a standard projection in the sense that it uses complex polynomials (of the tenth order) rather than a trigonometric formulation, though it was developed from an oblique stereographic projection.{{cite journal

| last1 = Snyder

| first1 = John Parr

| year = 1985

| title = Computer-assisted map projection research

| url = https://pubs.er.usgs.gov/publication/b1629

| format = PDF

| pages = 79–92; 147–51

| publisher = United States Geological Survey

| journal = Bulletin

| volume = 1629

| accessdate = 26 March 2013

}}

References

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Category:Conformal projections