8Motions blog

Just a short reminder, about what is supported as type of file for j2memap (both the library and the program):

- .loc

Used by geocaching application

- .gpx

Used by many gps related program. A subset of GPX1.1 is available, mainly include support for waypoint, trackpoint, track, ….

- .kml

Google Earth format (and used by many mapping application).

viewformat
viewrefreshmode
name
styleurl
style
iconstyle
color
coordinates

and a few others

- geoRSS

The following geoRSS tag are supported:
geo:lat
geo:long
georss:point
georss:line

(note that pubdate ,title and description are displayed)

- Others XML variant

As I’ve made a lot of interconnection with various XML providers, there are much more tags supported, a few of them:
address  : the address of the point
tel         : telphone number (usefull, as you have the ability to call this number directly)
photoUrl

So it’s already an impressive list, that can help you to create or use some cool mashup.

Also, as a new features, if the description contains an img reference, this description is displayed as an icon,like this:

And remember, as you have the ability to load KML created by Google MyMaps, you just can load them directly, like this one:

Another example, with different markers:

Technorati Tags: j2memap, 8motions, kml, mobile, gmap, gmap mobile, gpx, mymaps, where

In the latest release of J2memap library, a new interface has been defined: MapCustomOverlay

If you create a class that implements MapCustomOverlay, you will have the ability to dsiplay new layers on top of an existing map.

The implementation is easy, there are two methods:

   String getTileURL(int x,int y,int z,int sizeSq,boolean isSat);

and

    public boolean isTransparent();

  The last one just have to return true if transparent, or false otherwhise. The getTitleUrl must return to URL of a tile to be loaded at the corresponding x,y positions. sizeSq is the size of a square, usually 256, while isSat is true if the user is currently displaying a satellite image.

  To convert x “pixels values” into longitude, you can use MapCanvas.LonFromX() and MapCanvas.LatFromY() for y value.
  To display this layer, call the setOverlay(MapCustomOverlay) function (with null parameter to remove it). Just one overlay can be displayed at a time.
  This can be used to easily create WMS overlay, if you know the URL of a WMS server.

  Latest question, is: great, but what happens if I do not want to program and I want to be able to display a custom layer? Well, something good is coming, but if you want to test it, just drop me an email