lake county forestry gis for pls monument database...cor_id2 monument type, certified, accuracy...
TRANSCRIPT
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Nate Eide – Land Commissioner
Fran Kaliher – Public Land Survey Technician
MSPS 61st Annual Meeting – 2013
“GET IT SURVEYED!”
We are not surveyors, nor pretend to be. Our goal is to be a
centralized location of information. We leave the real survey work to you! Anything I say that sounds
like we do survey work is not intended.
Lake County 4th largest county in MN - 1.4M acres 83% publicly owned (58% Fed, 13%
State, 12% County) Population of 10,866 (2010 Census) –
130 acres/person! NO COUNTY SURVEYOR since 1948
Lake County Forestry 160,000 acres of mostly Tax Forfeited
land Managed for timber resources FSC certified Staff
1 administrative assistant 4 foresters 1 public land survey technician 1 Land Commissioner
Nate Eide B.A. Biology – natural
resources emphasis Graduate degree in GIS 7 years as GIS Specialist
Forest inventory Application development GIS management
11 Months as Land Commissioner
Fran Kaliher B.A. Biology 20 years as Land Survey
Field Crew Chief Field crew supervisor Instrument person Legal records research
12 years as Public Land Survey Technician Database of survey and
PLS information Field searches for corners
or evidence
GIS is Crucial for Our Operation Imagery – multiple years and seasons Forest Inventory Timber Sales Plantations Ownership Roads Topography Streams Lakes Wetlands Sensitive Features Ecological Information
Started with all Shapefiles and Coverages Managed by outside vendors
Paper maps
Technology Increased “user-friendly” Managed outside vendor/in house
Now Stored Mostly in Geodatabases Managed strictly in house
Hired full time GIS staff in 2005 (me) and 2010
Corners are still in shapefile, but will be in Geodatabases soon
Parcel Project
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All Field Data Digitally Collected Custom ArcPad Apps
Field Rugged PDA Juniper Archer
Bluetooth GPS Garmin (recreation grade)
SxBlue (sub-meter)
Hand-held GPS Trimble GeoXT
Garmin 76
With no County Surveyor, there wasn’t a centralized location for information
Foresters working with GIS consultant, Pro West (late ‘80s)
Sources Forester Knowledge
GPS (PLGR, Garmin, Trimble)
Other Lake County Departments
DNR
USFS
Township and Section Lines
Originally from DNR (USGS topo maps)
Now edited to match found evidence and monuments
The Difference Typically 50’ – 300’ different than USGS/DNR corners
Range is 50’ – 1528’ (worst is northern Lake County)
Average of 242’ difference
All sources are public information
Database is shared with surveyors and land resource managers on a case-by-case basis on request
Entire table is not shared, only by section
Individual corner information about certified corners and/or corners known to be accepted by registered surveyors is shared with the public. If coordinates are available [for those corners], the public is informed that only the monument itself represents the corner, regardless of where their handheld device leads them
G.I.S!!
DNR/Topo Line
Line Adjustment After USFS-Commissioned Survey
3,628 records
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FIELDS Explanation
ALPH__ID Alphanumeric corner name
TWP Township
RNG Range
COR_ID Type of record: monument/evidence, with/out
coordinates
MONUMENT_E Type of monument or evidence
SET_BY Who set the corner
YR_SET Year corner was set
SEEN When last observed
OBSERVER Who observed
X X UTM coordinate (meters)
Y Y UTM coordinate (meters)
GPS_CODE Type of GPS used
SOURCES Where the information came from
LINK_ Notepad document Y/N
COMMON_ Common Township corner
BEARINGTR1 Bearing tree information and other corner notes
BEARINGTR2
BEARINGTR3
BEARINGTR4
BT_S_SET_B Who set the BTs and when
ENTRY_BY_W When this record was entered
COR_ID2 Monument type, certified, accuracy
PHOTOLINK Link to photo of corner
CERT_LINK Hotlink to certificate of corner
Corner Naming Alpha-numeric system
Monument/Evidence
“Yellow Tag”
“Wood Post”
“WCMC”
“USFS Pipe”
“Scribed wood post”
“Rusty old tag on wd post”
“cert” (certificate)
“capped RB”
“¾” RB”
GPS Code
0 = survey grade
1 =engineering grade (+/- 3’-10’) ProXR, Trimble, etc.;
(1) = computed from 1’s or better
2 = resource grade (+/- 10’-30’) Garmin handhelds;
(2) = computed from 2’s or better
X = not GPS’d, location is hypothetical/USGS estimate/guess/off photo
C = computed or graphically estimated, better than X
sometimes computeds are shown as (1) or (2) – see above
Bearing Trees COR_ID2 – combined attributes 1st digit). monument (M) vs. evidence (E) vs. searched, no
evidence (X) vs. computed (C)
2nd digit). certified [usually by corner certificate, sometimes by plat] (C) vs. not certified (N)
3rd digit). GPS/other field coordinates’ horizontal precision:
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Certificate Link [CERT_LINK]
Done using “Layer Properties” of layer in ArcMap
DETECTIVE WORK
Story of T58N R11W “White Pine”
2002 Corners 2008 Corners
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1500’ +/-
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USFS later monumented this corner based on the recovered evidence
PLSS Zoom Tool Add Table Data to Database
ArcGIS “tool” Makes everything line up
Looks for errors in section and township
Helps fix errors
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Very interesting history lessons
Mutual benefit of information
GIS is very useful
ANY QUESTIONS?
Nate Eide [email protected]
Fran Kaliher [email protected]
218-834-8340