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

Streams

This data layer contains streams in Newton. Streams are generally narrow enough bodies of water to be represented as single lines at most mapping scales. Most streams in Newton run through underground drainage pipes for much of their length. The underground segments are represented as culverts and mostly have corresponding drainage pipes in the Storm Drainage layer. The Charles River is wide enough to be represented as a polygon feature at most common mapping scales so it is part of the Surface Water layer.

Records
262
Formats
5
Last updated
May 22, 2025

Download & API

Streams (CSV)csv
Spreadsheet — attributes, with coordinates for point layers
Download
Streams (GeoJSON)geojson
GeoJSON — for web maps and GIS tools
Download
Streams (GeoParquet)geoparquet
Columnar — query with DuckDB / SQL
Download
Streams (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
TYPEstring3 values: Culvert (108), Perennial (79), Intermittent (75)
NAMEstring
Flowstring3 values: Culverted (107), Natural (100), Channelized (47)