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| author | Kristian Evers <kristianevers@gmail.com> | 2019-12-09 11:46:53 +0100 |
|---|---|---|
| committer | Kristian Evers <kristianevers@gmail.com> | 2019-12-09 11:50:00 +0100 |
| commit | 5113b00d01430fff63f86d4ac766fba388bee83d (patch) | |
| tree | 9613da0ce59dce77973f708323ebdcda36df3456 | |
| parent | 4c39aa63fd2136b689628fe8c8b81de4f8b9432e (diff) | |
| download | PROJ-5113b00d01430fff63f86d4ac766fba388bee83d.tar.gz PROJ-5113b00d01430fff63f86d4ac766fba388bee83d.zip | |
isea docs: Rewrite intro and reference to reflect actual projection
Previous version was describing oea by mistake. It is also a projection
by Snyder and the isea docs was based on the paper on the oea
projection. This commit fixes that.
| -rw-r--r-- | docs/source/operations/projections/isea.rst | 16 | ||||
| -rw-r--r-- | docs/source/references.bib | 13 |
2 files changed, 21 insertions, 8 deletions
diff --git a/docs/source/operations/projections/isea.rst b/docs/source/operations/projections/isea.rst index 968d468b..adb703a1 100644 --- a/docs/source/operations/projections/isea.rst +++ b/docs/source/operations/projections/isea.rst @@ -4,16 +4,16 @@ Icosahedral Snyder Equal Area ******************************************************************************** -The Icosaheadra Snyder Equal Area projection is a series of equal-area map -projections. Lines of constant distortion follow approximately oval or -rectangular paths instead of the circles of the Lambert Azimuthal Equal-Area -projection or the straight lines of the Cylindrical Equal-Area projection. The -projection series permits design of equal-area maps of oblong regions with less -overall distortion of shape and scale than equal-area maps on other projections -:cite:`Snyder1988`. +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 | +| **Classification** | Polyhedral, equal area | +---------------------+----------------------------------------------------------+ | **Available forms** | Forward, spherical | +---------------------+----------------------------------------------------------+ diff --git a/docs/source/references.bib b/docs/source/references.bib index 0668e10d..15df52d7 100644 --- a/docs/source/references.bib +++ b/docs/source/references.bib @@ -317,6 +317,19 @@ Url = {https://www.researchgate.net/publication/290447301_The_Natural_Earth_II_world_map_projection} } +@Article{Snyder1992, + Title = {An Equal-Area Map Projection For Polyhedral Globes}, + Author = {John P. Snyder}, + Journal = {Cartographica}, + Year = {1992}, + Number = {1}, + Pages = {10--21}, + Volume = {29}, + + Doi = {DOI: 10.3138/27H7-8K88-4882-1752}, + Uri = {https://doi.org/10.3138/27H7-8K88-4882-1752} +} + @Book{Snyder1993, Title = {Flattening the Earth}, Author = {John P. Snyder}, |