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Question regarding the GeoMaps Demo

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bmesser

United Kingdom
234 Posts

Posted - May 29 2013 : 04:56:21

Hi

I have a question regarding the GeoMaps demo which I believe is using components from the latest release.

I notice that you add a "map pin" on the map as an overlay. What I would like to do is add a radar image as a transparent PNG rather than a "map pin". The images I have are a little larger (500x500) and would have to align with the correct bounding lat/lon of the underlying map (one thing I did notice in the demo that the "map pins" don't stay in the correct place when you scroll the map with the mouse).

So I suppose what I need to know is do you think I could align another image to match the projection of the map that you are using in the demo?

I think the projection I'm looking for is Web Mercator which is not the one I see in the demo so would it possible to plug in another mapping web service?

And most importantly can I overlay a transparent image on top of it?

I'm currently doing all this with a static map as the base layer and animating other layers on top of this using ImageEn components.

Bruce.

fab

1310 Posts

Posted - Jun 04 2013 : 01:36:07

You could use also layers (which support transparency). About the alignment you should do like in ImageEnView1DrawBackBuffer of the demo, that uses LongitudeToBmpX and LatitudeToBmpY of TIESlippyMap object.

quote:
(one thing I did notice in the demo that the "map pins" don't stay in the correct place when you scroll the map with the mouse).

I am not able to experience this problem.

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