Maybe I needed to add a little more info what I'd like to set up before
someone can help and think along.
I'll be using OpenLayers and CesiumJS to present the maps/layers.
1.) My basemap needs to be a normal OpenStreetMap map, only with a
different style than standard
- Should be possible to import using osm2pgsql, maybe better solutions
available?
- Plan to use PostgreSQL database on Windows 8.1 64b with PostGIS
(- the 'basemap' may be delivered via a small cache managed by GeoWebCache)
2.) As overlay I need to cache the aerial tiles from the remote tile server
- This is a normal overlay, tiles just build up on top of the base layer
when they arrive
- Should I run this from the same GeoServer instance, or would it be better
to use a separate one or even use MapProxy (got the latter working already)
3.) Another layer needs to be 'hybrid', the aerial tiles (2) need to get
the roads+names from the basemap
- I Should be able to use the mentioned hybrid OSM stylesheet to have
labels and roads/borders as transparent overlay
- The labels/etc. should only be visible on top of the aerial tiles, in
case the basemap is still visible for a specific tile, first that tile
needs to have become an aerial tile first
- Alternatively it may be better to combine aerial and OSM transparant
tiles on the fly, not sure if this is possible in GeoServer though.
Hope a light can be shed whether this setup is possible, what I should
avoid to do, or whether there are alternative solutions to my idea.
On Wed, Jan 21, 2015 at 5:31 PM, Kim Jansen <[email protected]> wrote:
> Hi all,
>
> I'm new to GeoServer and have been trying to get some caching running with
> GeoWebCache, the demos worked out well but I'm a bit lost whether and how I
> can get my idea to work in the best way.
>
> What I like to achieve is the following:
>
> 1.) Have a basemap with aerial pictures
> 2.) Have a layer with OSM roads, borders and names (all else transparent)
>
> I Will be requesting the data from OpenLayers and CesiumJS.
>
> ---
>
> The (layer acting as) basemap is available at a remote server and for
> performance reasons it would be great to cache the data temporarily at the
> local client (Windows 8.1 64b). Except from the URL it responds identical
> to the well known scheme used by Google Maps (example:
> http://mt.google.com/vt/lyrs=s&x=4&y=5&z=4 , only with a different URL
> before the first & of course ;-) ). Also same projection.
>
> I Plan to use the osm-hybrid-carto style sheet (
> https://github.com/andrewharvey/osm-hybrid-carto/). See for an example
> http://tianjara.net/map#12/-33.9844/151.1798 (select an Imagery and the
> OSM Hybrid layer).
>
> ---
>
> The idea is to load OSM data into a database and let GeoServer serve it
> out using two style sheets:
>
> a.) osm-hybrid-carto - when the remote server is available, such the OSM
> data provides a transparent overlay of roads/names
> b.) normal - when the remote server is not available, such that the OSM
> data provides a normal chart/map
>
> Next to that I would like to have the GeoWebCache functionality cache the
> following:
>
> a.) temporal aerial tiles from remote server - to limit load on the remote
> server and internet connection
> b.) transparent OSM roads/borders overlay from local server
> c.) full OSM map tiles from local server
>
> OpenLayers and CesiumJS should just be able to load any of the discussed
> as layers and switch between them on the fly, but that's the easiest bit...
>
> ---
>
> My questions:
>
> 1.) Is my idea feasible with a single GeoServer instance
> 2.) How do I set up GeoWebCache to listen to requests from a client and
> fetch the aerial tiles from the TMS server
> 3.) How do I set up GWC to cache the OSM transparent and 'full' tiles at
> the same time, while also delivering the aerial tiles
> 4.) Whether I'm missing something essential
>
> Hope someone can give me some help into the right direction :-).
>
> Cheers,
>
> Kim
>
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