google mapsgoogle-maps-api
Knowing the reference point, I want to get a list of all the shops (and co ordinates) based in that area.. For example all the shops in this mall:
https://goo.gl/maps/GFfWx8pze2T2
Is there a tool to do this online or something I can programatically use?
It is actually possible to place your top left corner at 0,0 and your bottom right at 50,50, if you want this. Of course you can place bottom right corner at 10,10, too, or whatever, within the limits: -90/+90 for latitude and -180/+180 for longitude.
The proportion should be:
/*
******************************************
Custom Projection - CARTESIAN
******************************************
*/
function CartesianProjection() {
// map size at zoom 0 is equal to tile size
this.tileSize = 256;
};
CartesianProjection.prototype.fromLatLngToPoint = function(latLng) {
var x = (latLng.lng() / 50) * this.tileSize;
var y = (latLng.lat() / 50) * this.tileSize;
return new google.maps.Point(x, y);
};
CartesianProjection.prototype.fromPointToLatLng = function(point, noWrap) {
var lng = (point.x / this.tileSize) * 50;
var lat = (point.y / this.tileSize) * 50;
return new google.maps.LatLng(lat, lng, noWrap);
};
Then you should place the center of the map to LatLng(25,25) in the Map options.
it is unlikely that you will be able to batch download all of Google Data. However, you can tap into Google Data using the Google Places API.
If you are interested in OpenStreetMap use Overpass Turbo zoom to your area of interest with the Mapview port as the area you will download using the Bounding Box code:
node
({{bbox}});
out;
Of course this will only get you Nodes (points). you will have to repeat for polygons, and lines.
or take the easy route and download a batch of all OSM data using Geofabrik.
Click your Sub-Region
Click your region
Click your Subregion of the Region
then once you have picked your area click .shp.zip (or whatever format you want)
When you have your data (from whichever method you use) then take the data into QGIS and select Analysis Tools > List Unique Values. That will give you a list. you will have to organize on your own. 
in ArcGIS use the technical article on Identifying Duplicate Field Values. In this case, the results that have a '0' in the field...this would make them unique and allow you to cluster for analysis.
Best Answer
Yes, you want to use the Google Places API. It allows you to search by keywords. You need to provide an API key, but for a free account you can get quite a few requests in per month.
I'm assuming you want to access it with JavaScript? There is also a nice Python wrapper for it on GitHub.
What you get back is not a download per se, but it provides all the info you need as JSON so you can easily create shapefiles or whatever format you need. You can even get at the photos associated with the places.