Overlays in street view
Rikkert Koppes
I would like to add an overlay to the google street view, specifically, for the upcoming venus transit (June 6), we would like to render the positions of the sun and Venus as seen from your own street.
We can calculate all relevant data, furthermore, the camera heading and pitch are available in the API. As far as I understand, the only thing missing to render these celestial objects on the map is a translation of the zoom level to pixels per degree or something similar. Specifically, to be able to render an object with given heading and pitch in the current pov, we need a translation from (heading, pitch) to x and y coordinates of the screen. With this information, we can draw a custom image over the street view layer, since, as I understand, the street view mode does not support polygon overlays.
Does anyone have any pointers in how to proceed?
Project info:
we currently provide a tool to visualize the Venus transit based on the users location at http://transitofvenus.nl/wp/where-when/local-transit-times/ specific info about the transit can also be found on our blog
Chris Broadfoot
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