adjacent parcel presentation
DESCRIPTION
Methodology for gathering and organizing for adjacent parcel analyzisTRANSCRIPT
Methodology to find Adjacent Parcels with Same Owner Name
Cesar Yoc
11-20-09
Bureau of Environmental Planning and Analysis
Table of Contents
1. Introduction: The Project
2. Method Use
3. Unionizing Hospitals and Institution Lots
4. About rails and BBL Duplicates
Project:• To create a database that contains
adjacent BBLs, tax lots, with the same
owner name
• To create a column that has unique IDs
for adjacent BBLs for water consumption
analysis and other projects
Introduction
www.microsoft.com
Microsoft Access 2003
Microsoft Excel 2003
ArcGIS 9.3
• The find adjacent features (Find Adjacent Features tool)
• The tools result is data stored in notepad
Using the tool
• Select a feature layer: the shapefile that has BBL owner name repeating more than once
• Select the unique field for list: BBL column or field
• Select attribute fields: owner name column or field
Method: the adjacent to features toolIntroduction
BBL Adjacent 2 Adjacent 3 Adjacent 4 Count Sum
Records
to
organize
1007790035 1007790039 1007790036 1 3 2 0 3 6 -3
1007790039 1007790036 3 2 0 0 2 5 -3
1007790043 1007790044 1 2 0 0 2 3 -1
1007790045 1007790044 1 2 0 0 2 3 -1
1007790062 1007790063 1 1 0 0 2 2 0
1007840014 1007840013 1 1 0 0 2 2 0
1007840054 1007840033 1 1 0 0 2 2 0
1007870025 1007870059 1 1 0 0 2 2 0
1007870040 1007870044 2 1 0 0 2 3 -1
1007870058 1007870040 1 2 0 0 2 3 -1
1007900009 1007900010 1 1 0 0 2 2 0
1007910030 1007910029 1 1 0 0 2 2 0
1007910068 1007910066 1 1 0 0 2 2 0
1007920039 1007920038 1 2 0 0 2 3 -1
1007920043 1007920038 1 2 0 0 2 3 -1
1007920061 1007920060 2 1 0 0 2 3 -1
1007920062 1007920061 1007920063 1 2 2 0 3 5 -2
1007920064 1007920065 1007920063 1 1 2 0 3 4 -1
Method : Method use to identify parcels that need to be organizedIntroduction
Method: Organizing adjacent parcel dataIntroduction
• Used the Excel find tool to check if the BBL is repeated in another cell. For example BBL number 2028530045 is found in all highlighted records (top table)
• The repeated BBL is deleted-not the one in record 5136, BBLs remaining are dragged into the 5136 record (bottom table)
Use ArcMap to check the record to
make sure it contains all the BBLs
that are adjacent to each other.
• Snapshot of the BBLs in
record 5136 (previous slide)
• 5 BBLs that are adjacent to
each other with the same
owner name (Parks and
Recreation)
Method: snapshot of BBLs for record 5136Introduction
Unique IDs Adjacency tables
– UniqueIDs for records in excel
document (records with more
than 25 BBLs)
– UniqueIDs for SQL Server
2005 tables (SQL Query-
Sequence)
UniqueID BBL Adjacen2 Adjacen3 Adjacen4
1 1000070030 1000070033 1000070037 1000070035
2 1000080039 1000080051
3 1000160003 1000160100
4 1000220020 1000220017
5 1000290019 1000290001
6 1000290046 1000290047
7 1000300005 1000300004
8 1000300033 1000300032
Method: entering UniqueIDs for each recordIntroduction
830729 1000070029
= 830729 1000070030
1000070033
1000070035
1000070037
830730 1000080051
1000080039
830731 1000220020
1000220017
• SQL query to transpose data
• Final table after appending the Excel document that contains
records with BBLs greater than 25
Method: transposing adjacency dataIntroduction
• SQL Queries to find
number of duplicates
• Organizing and
deleting repeating
records
• Union steps above
Method: checking data for duplicatesIntroduction
Counting BBLs from create View
SELECT Adjacen1, COUNT(Adjacen1) AS
countBBL
FROM dbo.alladjuniqueIDS_BBL_11_19_09
GROUP BY Adjacen1
BBLS that have Dups2
select BBL
from Dups2
where countBBL >1
www.microsoft.com
Universities and Hospitals UniqueID BBL
Brooklyn College 25843 3075520100
Brooklyn College 25843 3075560150
City College of New York 25844 1019570200
City College of New York 25844 1019570110
City College of New York 25844 1019570001
City College of New York 25844 1019570105
City College of New York 25844 1019570100
Columbia University 25839 1019730001
Columbia University 25839 1018670023
Columbia University 25839 1018840039
• Universities and Hospitals and its
adjacent blocks
• Unionizing data the adjacency tool didn’t
select
Method Universities and InstitutionsIntroduction
• These Islands have
the same BBL
(Owner: Parks and
Recreation
• 468 BBLs with dups
(Total dups: 1402)
Repeating BBL: 3045870012
Method Universities and Institutions BBL DuplicatesIntroduction
Adjacency tool does not
recognize the Penn
Central Company lots as
adjacent to each other,
unless the lots are
connected to each other
Method Universities and Institutions BBL Duplicates Rail TracksIntroduction
• Next step– Setting up method to combined universities and
hospital during the rearrangement process.
• Future use– Water Rate Study Analysis
– Mapping
– Other projects that require this data
Any Questions?
Method Universities and Institutions BBL Duplicates Rail Tracks Next StepsIntroduction