[Geomoose-users] TMS layers in GeoMoose 2.2

[Mark Volz]

Jim,

If I am not mistaken, I think TMS is in any projection (in my case county).  I think XYZ is in 3857.

Anyways, I just wanted to check out TMS as WMS in GeoMOOSE is extremely slow so I was hoping to use it mainly for debugging.  Please not the timings that I found.  This is for an area that already has a cache.

Mapcache WMS Source in GeoMOOSE - 7 seconds, many pink tiles, which is unacceptable
Mapcache TMS and WMS Source in Mapcache demo  - usually less than 10 ms
Mapserver using a GeoTiff to create an image for GeoMOOSE  - about 800ms which is okay, but 10 ms is so much faster!

I don't know why Mapcache is running so slow in GeoMOOSE.  It is taking roughly 1000 times longer to load in GeoMOOSE than in the Mapcache Demo.




Mark Volz
GIS Specialist

From: Jim Klassen [mailto:klassen.js at gmail.com]
Sent: Thursday, June 07, 2012 10:20 AM
To: Mark Volz
Cc: geomoose-users at lists.osgeo.org
Subject: Re: [Geomoose-users] TMS layers in GeoMoose 2.2

I haven't tried a TMS that isn't in the 3857 projection.  I wouldn't be surprised if this isn't easily supported before 2.6.  I know when I was trying out different TMS parameters in 2.4 that I needed to create a custom layer type to deal with it.  For more standard TMS layers, I used the "xyz" type in 2.4.

I would recommend you use WMS to access your MapCache tiles if you are using non-web-mercator projections in GeoMoose 2.2.  MapCache will still use any cached tiles to assemble the result.  GeoMoose 2.6 (along with the newer OpenLayers version) at least has the potential to make non-standard TMS configurations work from the mapbook.  (Although I suspect the code for the TMS map source will need to be extended... it will at least be possible to do this in a sane manner).

I haven't tried WMTS.  I suspect it misses the biggest reason of having tiles in the first place... the fact that they can be cached using standard HTTP caches and CDNs that aren't geo-spatially aware.  Tiles aren't so much for your server as they are for the network.  Also, make sure you have HTTP1.1 Keep-Alives active on your web servers.  Assuming that your data and map files are organized so that MapServer can operate efficiently, without Keep-Alives, the extra network overhead from the many requests for tiles will overwhelm any speedup from having everything cached.

Jim Klassen

On Jun 7, 2012, at 9:54 AM, Mark Volz wrote:


Hello,

I am trying to figure out how to set up a TMS layer for geoMOOSE.  If anyone knows what parameters are needed let me know.

Here is an example request from the mapcache TMS demo: http://10.0.8.116/mapcache/tms/1.0.0/MNSOUTH11@UTM15/0/0/1.jpg

Also, if WMTS or something else will work better for GeoMOOSE 2.2 / 2.6 let me know.


Thank You!

Mark Volz
GIS Specialist



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