Since Instagram has recently changed its platform regulations, this tool has stopped working on June 1 2016. More information here.
This small tool retrieves either the latest media tagged with a specified term or the media around a particular location and creates:
a tabular file containing a list of media with lots of meta-information;
a tabular file with information on the users related to those media;
a co-tag file (GDF format) to analyze e.g. in gephi;
For more information on how to use this tool, check out this video.
Before using the tool, you may want to have a look at the FAQ section here.