2
Try the open data portal for NYWC. For example, the NYC borough boundaries GIS data.
2
If by “submarket” you just mean “neighborhood” then there are plenty of open sources
For example:
https://github.com/veltman/snd3/blob/master/data/nyc-neighborhoods.geo.json
1
peaklist.org has a georeferenced dataset of "ultras" (peaks above 1500 meters in prominence) available as KMZ.
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