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Is there a way to convert coordinates to pixels?
Generally, am I doing right things? Or there is more easy way, given my data? There is no transformation between coordinates but to/from pixel positions, like this: we assume px, py is a pixel position in your map, while geox and geoy are real world coordinates.
How to convert lon / lat pairs to pixels?
I want to be able to simply convert arbitrary lon/lat pair to pixels on the map (also the ability to do reverse conversion). The maps come with .tfw file and projection info, here it is:
How to plot longitude and latitude in JavaScript?
I have successfully managed to get a latitude and longitude and plot it onto this map by taking the leftmost longitude and rightmost longitude of the UK and using them to work out where to put the point on the map. This is the code (for use in Processing.js but could be used as js or anything):
Where does latitude show in Mercator map projection?
However when I try a different latitude value ex: 58.07 (just north of the UK) it displays as north of Spain. The Mercator map projection is a special limiting case of the Lambert Conic Conformal map projection with the equator as the single standard parallel.
How to convert Lat to pixel in JavaScript?
So assuming that your map image is a screen grab of the Google Map display, then this will give you the correct pixel coordinate on that image of a lat/long coordinate. Things are trickier if you’re grabbing tile images and stitching them together yourself since the area of the complete tile set will lie outside the area of the displayed map.
How many pixels are in a pixel in Google Maps?
One of the important things to take into account is the “zoom” level of your projection (for Google Maps in particular). At zoom level 1, the map consists of 4 256×256 pixels tiles, resulting in a pixel space from 512×512. At zoom level 19, each x and y pixel on the map can be referenced using a value between 0 and 256 * 2^19