City-Wide 3D Buildings

GIS File Name

BOS3D_Bldg_BPDA_MP_Current

Format

ESRI Shapefile (Multipatch)

Description

The Boston Planning and Development Agency, Geographic Information System (GIS) City-Wide 3D project provides a detailed three-dimensional model including the terrain, groundplan and buildings of the city.

The buildings layer was developed from stereo photogrammetric methods, capturing the roof-details larger than 1 Meter with a precision of about 10 centimeters. The roof-print of the building is projected to a terrain model to create a 3D building volume.

Purpose

This buildings model is useful as a visual reference for the shape and location of buildings.

Sources

The BOS3D_Bldg_BPDA_MP_Current layer is composed of building models from three sources. Information about the source of each model is recorded in the attribute, Model_Src Most of the models originated with a 2011 photogrammetric survey by Infotech. This survey established building polygons with heights. Specific areas of the city have been augmented with more detailed interpretation of the same 2011 sources, to estimate more detailed roof geometry. This work was carried out by CyberCity 3D. Buildings that have been subject to Article80 large project review were modeled by the BPDA's Urban Design Technology Group and GIS Group.

Coordinate System

Projected Coordinate System:NAD 1983 StatePlane Massachusetts Mainland FIPS 2001 Feet

Geographic Coordinate System: GCS North American 1983

Usage Notes

The tile frame included with each tiled data set can be used to register the buildings layer with the tiled terrain model or with neighboring tiles.

Attribute Data Dictionary

The field schema for the Bos3d_Bldg_BPDA_MP layer is based on a template developed by pbcGIS. The fields are designed to record the staus of buildings at different phases of their life-cycle. Curently, not all of the attributes are completely filled out.

Field Name Type Description

Name

Text

Name of the building or Article-80 project.

Build_ID

Text

Building ID that would link to an Abstract Buildings Table. Currently set according to the Parcel ID intersected by the centroid of the building part.

Part_ID

Text

This would be an ID that could distinguish parts of a building that have different uses or were built at different times.

Status

Text (Domain)

Establishes the stage of the lifecycle for the building. Values of Status are taken from the Status_Code domain (described in more detail below).

Appear_Dt

Date

This is a date field that designates when the building would be turned on if a time-slider were used. It is not necessarily the date that the building part was built. It may be just the first known appearance of the building part.

Appear_Src

Text

This text elaborates on how the Appear date was established.

Editor

Text

The name or the person that edited the feature.

Model_Src

Text

The source of the model.

Model_Dt

Date

The date of the model.

ObliqueLnk

Text

A hyperlink that brings up an oblique view of the building in Google Streetmap.

Tile

Text

The tile to download the model.

Parcel_Use

Text

Land use of the parcel that the building part centroid falls inside.