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| author | Even Rouault <even.rouault@spatialys.com> | 2020-01-22 14:09:35 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-01-22 14:09:35 +0100 |
| commit | a95431d8666db9953115a3a824db396f8aa82b52 (patch) | |
| tree | 21117e52f95b8f36880efef8cd71c1fcec21242c /docs/source/operations/projections | |
| parent | c5fb54168665d41503ef3a08f0534da58949b632 (diff) | |
| parent | 4724025e6c817761052fc0dc8810fd489a9e0104 (diff) | |
| download | PROJ-a95431d8666db9953115a3a824db396f8aa82b52.tar.gz PROJ-a95431d8666db9953115a3a824db396f8aa82b52.zip | |
Merge pull request #1855 from rouault/rfc4_merge_back_master
[RFC4_dev] Merge master back to rfc4 latest branch
Diffstat (limited to 'docs/source/operations/projections')
| -rw-r--r-- | docs/source/operations/projections/isea.rst | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/docs/source/operations/projections/isea.rst b/docs/source/operations/projections/isea.rst index 1afedc30..adb703a1 100644 --- a/docs/source/operations/projections/isea.rst +++ b/docs/source/operations/projections/isea.rst @@ -4,6 +4,31 @@ Icosahedral Snyder Equal Area ******************************************************************************** +Snyder's Icosahedral Equal Area map projections on polyhedral globes for the +dodecahedron and truncated icosahedron offer relatively low scale and +angular distortion. The equations involved are relatively straight-forward, +and for certain instructional tools and databases, the projections are useful +for world maps. The interruptions remain a disadvantage, as with any low-error +projection system applied to the entire globe :cite:`Snyder1992`. + + ++---------------------+----------------------------------------------------------+ +| **Classification** | Polyhedral, equal area | ++---------------------+----------------------------------------------------------+ +| **Available forms** | Forward, spherical | ++---------------------+----------------------------------------------------------+ +| **Defined area** | Global | ++---------------------+----------------------------------------------------------+ +| **Alias** | isea | ++---------------------+----------------------------------------------------------+ +| **Domain** | 2D | ++---------------------+----------------------------------------------------------+ +| **Input type** | Geodetic coordinates | ++---------------------+----------------------------------------------------------+ +| **Output type** | Projected coordinates | ++---------------------+----------------------------------------------------------+ + + .. figure:: ./images/isea.png :width: 500 px :align: center |