Upload
ezra
View
41
Download
2
Tags:
Embed Size (px)
DESCRIPTION
IGIC Cadastral, Boundaries, PLSS Workgroup Project - New Authoritative GIS County Boundary. Lorraine Wright (Chair) Indiana Department of Environmental Management Office of Land Quality Science Services Branch GIS and Engineering Section Comments and suggestions welcome - PowerPoint PPT Presentation
Citation preview
IGIC Cadastral, Boundaries, PLSS
Workgroup
Project - New Authoritative GIS County Boundary
Lorraine Wright (Chair)Indiana Department of Environmental ManagementOffice of Land QualityScience Services BranchGIS and Engineering Section
Comments and suggestions welcome(317) [email protected]
IGIC website: www.igic.org
Workgroup website:http://igic.org/committees/cadboundplss.html
Building a New Authoritative GIS County Boundary
Layer for Indiana Based on County Data and County Participation
GIS County Boundary Workgroup Participants
Lorraine Wright - IDEM
Michael Stevenson - Gibson, Co Surveyors Asso.Rick Hill - IGS, INMAPBryan Catlin - MarionSteve Hook - NobleShaun Scholer - WayneDave Estes - AllenJohn Howe - Gibson
Phil Worrall - IGIC
Jim Milburn - HancockRobert Muller – State Land OfficeJason Coyle - ISPLSRyan Swingley –Seiler InstrumentsJim Sparks – IN GIO
Gunty Allen - Wayne
Cadastral, Boundaries, PLSS Workgroup Projects
•Tie C
ard Project – P
LSS
S
urveyor Tie Card Layer
(INM
AP
)
•N
ew G
IS C
ounty Boundary -
Point, Line, and P
olygon Layers
•G
overnment Land O
ffice (G
LO) R
ecords –
(Federal, State, &
County
Records linked in G
IS)
Tie Card Pilot Project
• Grid Points• Statewide Grid Point Naming Convention• Scanned Tie Cards• Renaming Software (need Adobe Reader)• Database Table (Access)
– automatically created when using Renaming Software• Database included Tie Card hyperlink• Click on map hyperlink and see scanned Tie Card pop-up• Training materials on website along with a video step by step
Components
• Grid Point File Naming Convention (approximate section corner and section division corners )
– IN02_T23NR06E03_08
– State Name and Principal Meridian – IN02 – Township Number – T23 – Township Direction – N – Range Number – R06 – Range Direction – E – Section – 03 – Grid Number – 08 (Grid numbering system begins with 00 in
upper left hand of section and ends in 80, bottom left corner)
Tie Card Project
Developed Statewide Grid Point Naming Convention
Grid Points are numbered00-80 in each section
Approximation of ¼, ¼, ¼ corners
Tie Card Project
NW NE
SW SEComputer generatedpoints
Grid point representationof section and¼ corner
Grid Point numbers(00, 04, 08,36, 40, 44,72, 76, 80)
IN02_T23NR06E03_08
NW Corner NE Corner
SW Corner SE Corner
Tie Card Project
IN02_T23NR06E03_80
IN02_T23NR06E10_08
Building a New Authoritative GIS County Boundary
Layer for Indiana Based on County Data and County Participation
New Authoritative GIS County Boundary
• Need for new GIS County Boundary• Design/process - Template• Development of [pilots]
– Allen, Gibson, Marion, Noble, and Wayne• Develop process for maintenance of a new GIS
County Boundary layer for the IndianaMap
New GIS County Boundary - Why?
• Need to match GIS data across counties by using a common boundary– Federal GIS data mandates (use standards)– State GIS data efforts are to have seamless data across county boundaries– County 911 calls – across adjacent counties– Match Boundaries – across adjacent counties
• Civil Township• County Boundary• Parcel Boundary (adjoining counties)• PLSS Boundaries• Street/Centerlines• Other
GIS County Boundary LayersDesign/Process
• Inventory – Different Scales– Census – Newberry Library– INDOT– IGS– 92 Individual County Boundaries– Southern Indiana Boundary
• Court case, coordinates on paper, DNR created shapefile– Northern Indiana Boundary Retracement Survey
• Ongoing• Need better accuracy – state-wide
County Boundary – Identified Laws/References (Design/Process)
Sources for County Boundary Legal Descriptions• Indiana laws – IN Revised Statute 1852 (multiple counties), follow
changes– IC 36-2-1-1 - Names of counties
Sec. 1. Indiana is divided into the ninety-two (92) counties named in this section. The boundaries of these counties existing on August 31, 1981, remain in effect until changed in the manner prescribed by section 2 of this chapter…
• County Boundaries Book– Legal references for county boundary descriptions– Published in 1933
• Newberry Library– History of Indiana Counties– Historical and current Indiana boundary shapefiles– Individual County Boundary Chronologies through 1981
• Individual County Surveyor Offices
Developed a Disclaimer
Location of the points in this GIS County Boundary Layer are approximate and should not be used for surveying and are NOT APPROVED by a COUNTY SURVEYOR for surveying purposes. Contact the County Surveyor’s Office when conducting research for surveying.
GIS County Boundary LayersDesign/Process
GIS County BoundaryDesign/Process
• County Boundary With Point Features Developed First – Acquire County Boundary legal descriptions– Identify PLSS corners and section lines that define boundary– Associate the legal information to the boundary points
• Best available OR Grid Points– Use County Boundary Template (available to counties)
• for documenting data collection process– Counties can use best available data to create boundary or use
the Grid Points – Counties decide– Develop line and polygon layers
• New GIS County Boundary– Best available boundaries will be on IndianaMap as County
Boundaries become available
Legal Description Call State Name Conv.
Northeast Corner of Section 15, T17N, R5E IN02_T17NR05E15_08 Beg
Southeast Corner of Section 34, T17N, R5E IN02_T17NR05E34_80
GIS County BoundaryDesign/Process
• Developed Template for New GIS County Boundary– Attributes– Structure (still refining)
• Need to be able to change GIS boundary points if GIS data is improved (documentation)
• New GIS County Boundary • Use best available data • Adjacent Counties to determine best common
boundary line• Communication between the County Surveyor
and GIS staff - important part of this process • New GIS County Boundary Template will be
available for Counties • Counties can import County Data into Template
GIS County BoundaryDesign/Process
GIS County BoundaryDesign/Process
• Template Attributes being refined for• Field length• Field type
• Maintenance procedures • Still to be worked out
GIS County BoundaryDesign/Process
• Better quality GIS County Boundary’s improve quality of associated layers
• PLSS, TR Section, Civil Township, other
• Pilot Counties: Allen, Gibson, Marion, Noble, and Wayne County
IGIC Cadastral, Boundaries, PLSS Workgroup
Working with Surveying Community Participants• Indiana Geographic Information Council (IGIC) –
– federal, state, county, local, private• Indiana Society of Professional Land Surveyors (ISPLS)• Office of the Indiana State Geodetic Advisor• Indiana County Surveyor’s Association• Indiana Geological Survey• Private Companies
Boundaries, Cadastral and PLSS Workgroup
• http://www.igic.org/committees/cadboundplss.html
Lorraine Wright (Chair)Indiana Department of Environmental ManagementOffice of Land QualityScience Services BranchGIS and Engineering Section
(317) [email protected]