Proof of concept.This is an unofficial demo built by Datopian from the City of Newton's public data. The official portal is newton-open-geo-data-newtonmagis.hub.arcgis.com. Questions or feedback: hello@datopian.com

A PortalJS proof of concept · data from the City of Newton's ArcGIS Hub

NHESP Potential Vernal Pools

Potential Vernal Pools - Massachusetts Natural Heritage and Endangered Species Program

Records
199
Formats
5
Last updated
Jun 13, 2025

Download & API

NHESP Potential Vernal Pools (CSV)csv
Spreadsheet — attributes, with coordinates for point layers
Download
NHESP Potential Vernal Pools (GeoJSON)geojson
GeoJSON — for web maps and GIS tools
Download
NHESP Potential Vernal Pools (GeoParquet)geoparquet
Columnar — query with DuckDB / SQL
Download
NHESP Potential Vernal Pools (map tiles)pmtiles
Vector tiles — embed in a map
Download
Live ArcGIS layer (source)arcgis
Download

Rendered from PMTiles, queried in-browser from GeoParquet — no server. How this works

Schema

FieldTypeValues
TOWN_IDinteger35 to 333
TOWNstring10 values: WESTON (37), BOSTON (35), NEEDHAM (34)…
PVP_NUMBERinteger2,924 to 28,440