[OpenLayers-Users] Panoramio photos as a vector layer

[José Manuel Mira Martínez]

Hi list,

This is my first post.

I have developed an html-javascript script to load Panoramio's  photos in
OpenLayers. Panoramio  (http:/www.panoramio.com) is a great store of
georeferenced photos accesible with a public API (
http://www.panoramio.com/api/) that allows to get a doc in JSON format.
A how-to explanation can be viewed as a post in our blog (in spanish -
http://www.gisandchips.org)
:http://www.gisandchips.org/2010/05/04/openlayers-y-panoramio/

We have also made two examples:

1. OpenLayers with OpenStreetMap base layer and Panoramio:
http://www.gisandchips.org/demos/j3m/panoramio/panoramio.html
2. OpenLayers with WMS base layer and Panoramio:
http://www.gisandchips.org/demos/j3m/panoramio/panoramio_4326.html

Now, my questions:
1. How can I design a new custom layer format (
http://docs.openlayers.org/library/formats.html) for Panoramio to load the
layer as usual (example: panoLayer = new
OpenLayers.Layer.Format.Panoramio(<json data>).
 I make an unique JSON data request, but I don't know how to make  the layer
persistent (new httpRequest)  for every zoom-pan event which  loads new
data.

Any suggestions are welcome

Regards
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