Appendix Conversion Factors - USEPA/ATtILA2 GitHub Wiki
Conversion Factors
These tables were copied from the Esri document, 'ArcGIS Pro 2.8 Projected Coordinate Systems Tables'. It is available for download at:
https://pro.arcgis.com/en/pro-app/2.8/help/mapping/properties/pdf/projected_coordinate_systems.pdf
Conversion factors to convert to square meters
| Area Unit of Measure Name | Conversion Factor |
|---|---|
| 150_Kilometers | 22500000000.0 |
| 50_Kilometers | 2500000000.0 |
| Centimeter | 0.0001 |
| Chain | 404.68564224 |
| Chain_Benoit_1895_A | 404.68493412895 |
| Chain_Benoit_1895_B | 404.684937926029 |
| Chain_Clarke | 404.678379705448 |
| Chain_Sears | 404.684238955715 |
| Chain_US | 404.687260987426 |
| Decimeter | 0.01 |
| Fathom | 3.34450944 |
| Foot | 0.09290304 |
| Foot_1865 | 0.092903548000694 |
| Foot_Benoit_1895_A | 0.092902877440071 |
| Foot_Benoit_1895_B | 0.09290287831176 |
| Foot_British_1936 | 0.092903496651921 |
| Foot_Clarke | 0.09290137275148 |
| Foot_Gold_Coast | 0.092902863326732 |
| Foot_Indian | 0.09290274144751 |
| Foot_Indian_1937 | 0.092902070738528 |
| Foot_Indian_1962 | 0.09290279616016 |
| Foot_Indian_1975 | 0.09290273520025 |
| Foot_Sears | 0.092902717850256 |
| Foot_US | 0.092903411613275 |
| Inch | 0.00064516 |
| Inch_US | 0.000645162580648 |
| Kilometer | 1000000.0 |
| Link | 0.040468564224 |
| Link_Benoit_1895_A | 0.040468493412895 |
| Link_Benoit_1895_B | 0.040468493792603 |
| Link_Clarke | 0.040467837970545 |
| Link_Sears | 0.040468423895572 |
| Link_US | 0.040468726098743 |
| Meter | 1.0 |
| Meter_German | 1.00002719318486 |
| Mile_US | 2589998.47031953 |
| Millimeter | 0.000001 |
| Nautical_Mile | 3429904.0 |
| Nautical_Mile_UK | 3434290.937856 |
| Nautical_Mile_US | 3434528.149504 |
| Rod | 25.29285264 |
| Rod_US | 25.2929538117141 |
| Statute_Mile | 2589988.110336 |
| Yard | 0.83612736 |
| Yard_Benoit_1895_A | 0.83612589696064 |
| Yard_Benoit_1895_B | 0.836125904805841 |
| Yard_Clarke | 0.836112354763322 |
| Yard_Indian | 0.836124673027593 |
| Yard_Indian_1937 | 0.836118636646753 |
| Yard_Indian_1962 | 0.83612516544144 |
| Yard_Indian_1975 | 0.83612461680225 |
| Yard_Sears | 0.836124460652307 |
| Yard_Sears_1922_Truncated | 0.836123702404 |
| Yard_US | 0.836130704519474 |
Conversion factors to convert to meters
| Linear Unit of Measure Name | Conversion Factor |
|---|---|
| 150_Kilometers | 150000.0 |
| 50_Kilometers | 50000.0 |
| Centimeter | 0.01 |
| Chain | 20.1168 |
| Chain_Benoit_1895_A | 20.1167824 |
| Chain_Benoit_1895_B | 20.1167824943759 |
| Chain_Clarke | 20.11661949 |
| Chain_Sears | 20.1167651215526 |
| Chain_US | 20.1168402336805 |
| Decimeter | 0.1 |
| Fathom | 1.8288 |
| Foot | 0.3048 |
| Foot_1865 | 0.304800833333333 |
| Foot_Benoit_1895_A | 0.304799733333333 |
| Foot_Benoit_1895_B | 0.304799734763271 |
| Foot_British_1936 | 0.3048007491 |
| Foot_Clarke | 0.304797265 |
| Foot_Gold_Coast | 0.304799710181509 |
| Foot_Indian | 0.304799510248147 |
| Foot_Indian_1937 | 0.30479841 |
| Foot_Indian_1962 | 0.3047996 |
| Foot_Indian_1975 | 0.3047995 |
| Foot_Sears | 0.304799471538676 |
| Foot_US | 0.304800609601219 |
| Inch | 0.0254 |
| Inch_US | 0.0254000508001016 |
| Kilometer | 1000.0 |
| Link | 0.201168 |
| Link_Benoit_1895_A | 0.201167824 |
| Link_Benoit_1895_B | 0.201167824943759 |
| Link_Clarke | 0.2011661949 |
| Link_Sears | 0.201167651215526 |
| Link_US | 0.201168402336805 |
| Meter | 1.0 |
| Meter_German | 1.0000135965 |
| Mile_US | 1609.34721869444 |
| Millimeter | 0.001 |
| Nautical_Mile | 1852.0 |
| Nautical_Mile_UK | 1853.184 |
| Nautical_Mile_US | 1853.248 |
| Rod | 5.0292 |
| Rod_US | 5.02921005842012 |
| Statute_Mile | 1609.344 |
| Yard | 0.9144 |
| Yard_Benoit_1895_A | 0.9143992 |
| Yard_Benoit_1895_B | 0.914399204289812 |
| Yard_Clarke | 0.914391795 |
| Yard_Indian | 0.914398530744441 |
| Yard_Indian_1937 | 0.91439523 |
| Yard_Indian_1962 | 0.9143988 |
| Yard_Indian_1975 | 0.9143985 |
| Yard_Sears | 0.914398414616029 |
| Yard_Sears_1922_Truncated | 0.914398 |
| Yard_US | 0.914401828803658 |
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