Application specific layers

Mark_lester · 2011-09-08T06:35:49.000Z

Is there a method for creating your own layer of information, either as an open “instance” of stuff such as tourist routes (openlayers is this slippy map stuff right ?), or as a private/corporate layer, e.g. where all our stuff is, etc.

I’d like to run my own OSM compliant instance, with a modified set of objects, using OSM proper as the underlay (would ultimately be nice to tie routes to objects so if the road changes so does the route).
This is obviously a massive issue, there are endless applications. Is there any discussion about this kind of stuff and how one might achieve this.

Lambertus · 2011-09-08T07:41:06.000Z

OpenLayers is the client side of things. The provider of the custom layer(s) is -in the case of OSM mostly- Mapnik.

JRA · 2011-09-08T10:21:26.000Z

Mark lester:

Is there a method for creating your own layer of information, either as an open “instance” of stuff such as tourist routes (openlayers is this slippy map stuff right ?), or as a private/corporate layer, e.g. where all our stuff is, etc.
.

Perhaps something like these examples:
Show primary highways from OSM and borders and sea levels coming from another source (could be as well your private data)
http://hip.latuviitta.org/cgi-bin/ms_ows?REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&WIDTH=563&HEIGHT=437&LAYERS=sea,borders,osm_viivat&TRANSPARENT=TRUE&FORMAT=image/png&BBOX=-369151.98300283286,6597900.0,1511076.628895184,8057331.444759207&SRS=EPSG:3067&STYLES=&sql=%28tags%20@%3E%20%27highway=%3Eprimary%27%29

It is a live service and you can select to show secondary highways instead
http://hip.latuviitta.org/cgi-bin/ms_ows?REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&WIDTH=563&HEIGHT=437&LAYERS=sea,borders,osm_viivat&TRANSPARENT=TRUE&FORMAT=image/png&BBOX=-369151.98300283286,6597900.0,1511076.628895184,8057331.444759207&SRS=EPSG:3067&STYLES=&sql=%28tags%20@%3E%20%27highway=%3Esecondary%27%29

It is a live service and you can select to show primary but only if they do not have maxspeed tag
http://hip.latuviitta.org/cgi-bin/ms_ows?REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&WIDTH=563&HEIGHT=437&LAYERS=sea,borders,osm_viivat&TRANSPARENT=TRUE&FORMAT=image/png&BBOX=-369151.98300283286,6597900.0,1511076.628895184,8057331.444759207&SRS=EPSG:3067&STYLES=&sql=%28tags%20@%3E%20%27highway=%3Eprimary%27%29%20AND%20not%20%28tags%20?%20%27maxspeed%27%29

Do you want to find the hairdresser POIs from OSM? It could be where your stuff is from your private data as well
http://hip.latuviitta.org/cgi-bin/ms_ows?REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&WIDTH=563&HEIGHT=437&LAYERS=sea,borders,osm_pisteet&TRANSPARENT=TRUE&FORMAT=image/png&BBOX=-369151.98300283286,6597900.0,1511076.628895184,8057331.444759207&SRS=EPSG:3067&STYLES=&sql=%28tags%20@%3E%20%27shop=%3Ehairdresser%27%29

No Mapnik, no pre-rendered tiles nor OpenLayers are used for these examples. However, it would be easy to add these dynamic layers into OpenLayers map as WMS layers as described in the OpenLayers documentation http://dev.openlayers.org/releases/OpenLayers-2.10/examples/wms-untiled.html

Mark_lester · 2011-09-08T13:09:14.000Z

Lambertus:

OpenLayers is the client side of things. The provider of the custom layer(s) is -in the case of OSM mostly- Mapnik.

Mapnik looks like a one stop shop
http://trac.mapnik.org/wiki/DemoGallery
many thanks.

JRA · 2011-09-08T14:46:23.000Z

If you had your own features marked with a tag like “mark_lesters_own_feature=yes” you could select and show it from my server as easily as you can now show, let’s say “highway=bus_stop”, and without you or me doing anything for the system.

http://hip.latuviitta.org/cgi-bin/ms_ows?REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&WIDTH=563&HEIGHT=437&LAYERS=sea,borders,osm_pisteet&TRANSPARENT=TRUE&FORMAT=image/png&BBOX=-369151.98300283286,6597900.0,1511076.628895184,8057331.444759207&SRS=EPSG:3067&STYLES=&sql=%28tags%20@%3E%20%27highway=%3Ebus_stop%27%29

I am sure that Mapnik could be used as an engine to this kind of flexible services. Unfortunately rendering transparent tiles seems to be the only solution that people consider.