the knowlage shuld be:
add to existed admin panel geo location function and need to add to existed drawing app function to add/move/scale simple shapes ( arrows, rectangle, circle… ) and some more small functions.
need fast developer to work with grup.
8 freelancers are bidding on average $70 for this job
i'm computer engineering and made my final paper based on geospacial using Google API's, so, i think that it's a extra power that are you needing to our project.