Decks

GIS File Name

BASEMAP_Decks

Description

City of Cambridge, MA GIS basemap development project encompasses the land area of City of Cambridge with a 200 foot fringe surrounding the area and Charles River shoreline towards Boston. The basemap data was developed at 1" = 40' mapping scale using digital photogrammetric techniques. Planimetric features; both man-made and natural features like vegetation, rivers have been depicted. These features are important to all GIS/mapping applications and publication. A set of data layers such as Buildings, Roads, Rivers, Utility structures, 1 ft interval contours are developed and represented in the geodatabase. The features are labeled and coded in order to represent specific feature class for thematic representation and topology between the features is maintained for an accurate representation at the 1:40 mapping scale for both publication and analysis. The basemap data has been developed using procedures designed to produce data to the National Standard for Spatial Data Accuracy (NSSDA) and is intended for use at 1" = 40 ' mapping scale.

Purpose

City of Cambridge 1" - 40' base map layers from an April 14, 2010 flyover. Basemap layers created by Infotech America.

Download Layer Data

Attributes

Name Type Details Description
TOP_GL type: Double
width: 8
precision: 38
Elevation of highest point above ground level (NAVD88)
TOP_SL type: Double
width: 8
precision: 38
Elevation of highest point of deck above sea level (NAVD88)
BASE_ELEV type: Double
width: 8
precision: 38
Base elevation of deck (NAVD88)
ELEV_GL type: Double
width: 8
precision: 38
Elevation of deck above ground level (NAVD88)
ELEV_SL type: Double
width: 8
precision: 38
Elevation of deck above sea level (NAVD88)

Coordinate System

NAD 1983 StatePlane Massachusetts Mainland FIPS 2001 Feet