Hi,
I have a problem with this very useful plugin.
If I load a Postgis dataset which includes points across 180, for data captured
around New Zealand, using longitudes in the 0-360 space (which is valid data
for EPSG:4326) they plot fine in QGIS.
If I then start the plugin & use a Google/Yahoo/etc basemap, the points are
(usually) initially in the correct place and plot OK. Sometimes the points in
the W hemisphere fail to render, sometimes they are OK. This is on a zoomed out
map.
As I zoom in, QGIS starts to omit the points in the W hemisphere altogether,
even in the configurations that were OK when zoomed out. QGIS also sometimes
starts to offset the points from the basemap, so that the western points on the
map plot at an increasingly offset position, and the eastern points are
missing. As I zoom back out, this offset is retained and the map fails to
overlay the points correctly.
I'm assuming this is related to the plugin switching the canvas to EPSG:3857
and failing to support the 0-360 longitude coordinates. Given Proj.4 is used as
the reprojection engine, there should be no problems with the 0-360 coords
being correctly mapped to EPSG:3857, as in my experience Proj.4 (cs2cs) has
supported 0-360 input seamlessly for some years now.
Is there any simple fix I can apply? If some funding is required to make the
plugin work correctly across 180 with 0-360 longitude data, this is possible.
inTHANKSvance
Brent Wood
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