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I am interested in understanding and applying practical geo-spatial examples for some of the transportation data that I have. I have several geocodes that I will pull from the database, and display in maps - as map clusters and points, similar to Redfin.

I want to unlock more value of my data - for instance allow the user to draw a ploygon and compute the number of points inside the polygon. Click on 2 markers and display distance etc. This makes the map more feature rich as opposed to a simple cluster of markers.

I like what leaflet offers and the abilities in Postgres/PostGIS to issue geospatial queries, and I am looking to build UI where users can query in a more intuitive mouse click and drag operations. Please point me to some good examples or sites that have implemented this.

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closed as too broad by PolyGeo Dec 20 '14 at 3:23

There are either too many possible answers, or good answers would be too long for this format. Please add details to narrow the answer set or to isolate an issue that can be answered in a few paragraphs.If this question can be reworded to fit the rules in the help center, please edit the question.

up vote 3 down vote accepted

Each of the things you've mentioned is easily do-able in web mapping APIs like ArcGIS Server JS API and OpenLayers. For example:

It would be relatively simple to stitch all of this functionality together.

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Nice. Openlayers seems to have most of what I am looking for. I rather stick to that, as I need to present google, live and ArcGIS maps as basemap options. – Ramesh Elaiyavalli Sep 7 '12 at 0:27

Example of Desktop like UI using ExtJS and Openlayers

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We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.

Can you share more examples? While this site has a ton of features, I am looking for something more simple. An easy way to draw, measure, query points inside polugon etc. – Ramesh Elaiyavalli Aug 19 '12 at 19:07
sorry for being late but the second answer may be the answer – geogeek Aug 24 '12 at 3:34

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