NYC Zoning Lots
A nascent attempt to create a dataset of zoning lots for New York City.
A chaotic summary of where this came from
Filter ACRIS-Real-Property-Master dataset from NYC Open Data for documents that are of type
CERT (certificate) (yields ~45K of 17M documents)
For each certificate, ping ACRIS web app and log those with more than one associated parcel (aka tax lot). Most certs meeting this description are describing a zoning lot. (this yields 4,531 documents, and ~22,000 associated tax lots)
Use MapPLUTO 20v1 to look up a geometry for each of the 22,000 tax lots
Collect the geometries for each zoning lot document, yielding 3860 multipolygons (671 zoning lot documents from ACRIS reference tax lots that no longer exist on the modern DTM. These would need additional research and to have geometries manually added)
Other things to be aware of
- Sometimes there are overlapping groups of polygons, as zoning lots may supercede other zoning lots in the same area. These should be de-duped manually favoring the newest one so we are left with a current picture of zoning lots.
- The dataset has not been vetted yet, and is a best effort
- ACRIS does not include records for Staten Island, so there are no SI zoning lots in this dataset
- This dataset is based on zoning lot certificates, which are a DOB requirement, there are instances where a zoning lot may be created but a certificate is not filed (I think). Basically, we need some subject matter experts to weigh in on the completeness of a zoning lot dataset with this many rows? Do we have 50% of them? 80%? More? Less?
How to Convert this dataset’s body into a shapefile
This dataset includes a column called
geom that includes a Well-known Text MultiPolygon for each row. You can use desktop GIS software to work with the CSV body.
To open the body in QGIS
- Export a dataset version by right-clicking the version in the history tab of Qri Desktop. This will save a directory of all dataset components, including
- In QGIS, import a delimited text file using the
Layer > Add Layer > Add Delimited Text Layer...
- Choose the
body.csv file you exported. The layer will be added to your current QGIS project
From here, you can easily export to Shapefile, GeoJSON or any other spatial format that QGIS supports by right-clicking the layer and clicking
Export > Save Features As...