I need to create a Plate Carrée map and I want to do so in QGIS. However I encountered a projection glitch in the Print Composer when I use EPSG:32662:

Projection Glitch of Plate Carree [EPSG:32662] in QGIS Print Composer

QGIS says that EPSG:32662 is deprecated and this gisSE answer suggests that also its successor EPSG:32663 is outdated and that EPSG:4087 replaced it. Spatialreference.org says that ESRI:54001 is the "World Plate Carree". Neither of the last three can be found in QGIS' CRS settings. Simply using unprojected WGS84 / EPSG:4326 doesn't look correct for my task.

Which one is the correct Plate Carree for QGIS and how can I set it?

  • A proj string for 32662 is here. – mkennedy Nov 8 '18 at 20:14
  • why doesn't 4326 "look correct" - that is the usual Plate Carree projection – Ian Turton Nov 9 '18 at 8:38
  • First of all, with EPSG:4326 Positron disappears in QGIS 2.18.2 when I zoom out beyond ~ 1:75,000,000, depending on coordinates, often earlier. Secondly, in QGIS 3.2 it produces the weird glitch in the gif above (also, interestingly beyond a certain zoom level). The same is true for EPSG:32663. Thirdly, it's probably a philosophical topic: sharpgis.net/post/2009/02/06/… – Stefan Nov 9 '18 at 11:48
  • EPSG:4326 has the proj4 string +proj=longlat +datum=WGS84 +no_defs (as opposed to "latlong") and QGIS specifies Extent: -180.00, -90.00, 180.00, 90.00. My custom CRS doesn't have an extent and I have the feeling that this is the reason why it doesn't glitch when the viewport/some coordinates leave that extent...). – Stefan Nov 9 '18 at 11:55

Turns out that I might have found a bug in QGIS 3.2. In QGIS 2.18 LTS EPSG:32662 works as intended. Since I wanted degrees as map units rather than meters I created my own CRS in Settings > Custom Projections with this proj4 string:

+proj=latlong +datum=WGS84 +no_defs

PS.: This doesn't solve the glitch in QGIS 3.2's Print Composer when I set the element's extent to [-180,-90,180,90]...

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