You might want to look at what TileMill does and see if that helps your scenario.
On Sep 21, 2012, at 9:27 PM, Stephen Woodbridge <[email protected]> wrote: > On 9/21/2012 8:53 PM, hz hanks wrote: >> Hey, All: >> >> I have created a simple web based map application using >> OpenLayers.Layer.OSM. Now I'm asked to cache part of the map in >> advance. ( Say, cache it when it's accessible to the Internet and then >> we may move the laptop to a place without the Internet. ) >> >> My idea is to use setCenter( center, zoom ) function to change the >> zoom argument and let the OpenLayer to cache the data. I went through >> the example of offline-storage.js provided by OpenLayer and now how to >> add cache control. But how can I make sure that all data is cached >> before I change the zoom argument again? I tried to register event >> "loadend" ( change the zoom argument after "loadend" is triggered ) >> but it didn't work. Did I choose a wrong event? Or is this idea not >> feasible ( caching every tile that has been displayed is not >> guaranteed? ). Is there any other way to do that (e.g. create a >> offline map of a desired area) and how? > > This is not a function or capability of OpenLayers, but that said you might > want to ask this question on the Mapserver.org list regarding mapcache. > > The idea being to set up apache2 on your laptop with mapcache installed and > configured to pull tiles from OSM, then configure your OpenLayers app to pull > tiles from mapcache. Mapcache will pull and cache the tiles locally as they > are requested or you can run a seeder that will pre-populate the tiles. > > There are two problems that I see with this setup: > > 1. unless you have a huge disk you will need to write a script to clean tiles > that you do not need. > > 2. you need to write a script to run the seeder and pull the area of interest > that you are interested in, before you go offline. > > Hope this helps, > -Steve W > > _______________________________________________ > Users mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/openlayers-users _______________________________________________ Users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/openlayers-users
