Chris Metzler wrote:
> On Wed, 24 May 2006 12:30:24 +0000 (UTC) Martin Spott wrote:
>> I'm inclined to replace VMAP0 data in the Landcover DB with VMAP1 where
>> the latter is available, but first I'll have to investigate if the
>> extent of the VMAP1 tiles really and precisely matches the definition
>> of its bounding boxes. We don't want to see gaps or overlays - do we ?
>
> Do you have a feel for how to resolve interfaces between regions where
> we'd have to switch from vmap1 to vmap0?
No, I don't have any idea - I guess this will be a time-consuming task
to find out. I'll start by stuffing everything from VMAP1 into the DB
and have a look at the borders between VMAP0 and VMAP1. Remember that
the Mapserver is not the only way to have a look at the data. The
current set is available as shapefiles so everyone who has QGIS on
their PC could load two layers and participate in comparing these.
The more people participate, the earlier we're ready. From experience I
presume nobody will participate so it'll take a very long time until
I'm ready ....
> Suggestion: make a tile once with vmap1 and once with vmap0, and make
> available for dl, so people can give some input on fps hit?
I think I'll start with a 2x2 degree shapefile set for KOSH, so if
someone would build a scenery tile from that we all could get a sense
on how detailed VMAP1 actually is.
> Do the current rivercourses come from vmap0?
For the current scenery _nothing_ comes from GSHHS but instead fron
VMAP0 only. GSHHS contains a very accurate shoreline but no line data
at all. Curt decided not to take GSHHS for the shoreline because the
VMAP0 landuse data doesn't match with the shoreline as VMAP0 landuse
matches its own terribly inaccurate political boundaries as shoreline.
I use GSHS shoreline for the Mapserver as default because I'm
convinced that there's no alternative.
Cheers,
Martin.
--
Unix _IS_ user friendly - it's just selective about who its friends are !
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