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City of Philadelphia
PACSCL Geo-History Symposium
Department of RecordsGIS and Parcel Mapping:Georeferencing, Edgematching and Annotation December 2005
Pla
nnin
g C
omm
issi
on s
cans
par
cels
IT Timeline and Historical Context
Str
eet C
ente
rlin
e is
dev
elop
ed
Sta
ndar
diza
tion
of G
IS s
oftw
are
Ort
hoph
otog
raph
y an
d P
lani
met
rics
cre
ated
Str
eet C
ente
rlin
e re
ctifi
ed to
Ort
hoph
otog
raph
y
Rec
ords
Dep
artm
ent d
igiti
zes
Reg
istr
y M
aps
1991 2005O
rtho
phot
ogra
phy
Upd
ate
Land
Rec
ords
Met
abas
e de
sign
ed
DO
R S
crub
Edi
ting
Edg
emat
chin
g an
d D
PR
Pilo
tE
dgem
atch
ing
and
DP
R
City
wid
e an
nota
tion
City Environment
Commitment to GIS
Infrastructure
Policies
Standard Software – ESRI product line
Facilitates the Exchange of Data among City Agencies
Parcel Layer – Accuracy / Quality
Scanned
Geo-referenced
Orthophotography
Control Points
Edge-matched
Seamless Integration of Map Sheets
Expanded ability to scroll across entire City
Increases usability
Annotated
Engineering Accuracy Preserved
Typical DOR Parcel Registry Map
More than 4,800 Maps Tile Across Philadelphia
3 Parcel Registry Maps Located in Tile 14
Georeferencing 3 Individual Parcel Maps
Area of Parcel Map Overlap
Georeferencing with Orthophotography
1. Curb lines are extracted from orthophotos2. Scanned parcel maps are scaled and rotated to line up with curb lines
Another Perspective on Georeferencing
Pre Edgematching and DPR
Post Edgematching and DPR
Scanned Parcel Registry Map
Existing GIS Parcel Features
Parcel Features Viewed with Annotation
Highly Accurate Parcel Layer as Citywide Base Map
Department of RecordsGIS Parcel Layer
Parcel Maps Leveraged by Applications Internet Parcel Explorer
Photo Archives
Culture Browser
City of PhiladelphiaDepartment of Records
AcknowledgementM&M Solutions LLC
Thank You!
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