Date: July 12, 2018
Location: MDC Credit Union Jefferson City, Missouri
Time: 10:30 a.m.
Agenda
1. Call to Order Meeting called to order at 10:31 a.m.
2. Welcome and Introductions
Ex-officio
Missouri Spatial Data Information Service Tom Vought – present
USGS David Nail – telephone
OA ITSD GIS Tracy Schloss – excused
State
OA ITSD Konrad Hughes – excused
MoDOT Joe Carter – present
OA ITSD Economic Development Colin Duewell, Chair – present
OA Budget and Planning Matt Hesser – absent
Missouri National Guard Wiley Howell – excused
OA-ITSD Health and Senior Services Sruti Banerjee – absent
Department of Conservation Tim Bixler – excused
Missouri Dep’t of Natural Resources Michael Weller – telephone
MSHP Jeff Herzer – absent
Cooperating
Washington University in St. Louis Bill Winston – telephone; proxy for Aaron Addison
Sanborn Mapping Brad Arshat – telephone
SEMO RPC Stan Balsman – telephone
Wilson & Co. Eric Cenovich – present
USDA-NRCS Marty Comstock – absent
USDA-NRCS Debra Boshert – telephone
Surdex Tim Donze, Treasurer – excused
City of Columbia Taylor Bowen – absent
Camden County Jennifer Bowden – present
Northwest Missouri State University Ming-Chih Hung – telephone
Cole County Melissa Johnson – present
City of Lee Summit Steve Marsh – excused
Woolpert, Inc. Kent Park – telephone
City of Jefferson Buster Schrage – present
MoRAP Diane True – absent
City of Maryland Heights Andy Wagner – telephone
Boone County Unassigned – absent
MU CARES
MSPS
US ACE St. Louis
Boone County Fire Protection District
Jasper County GIS Coordinator
Chris Barnett – telephone
Jon Cole – present
Michael Gawedzinski – telephone
Jason Warzinik – telephone
Chase Fisher – telephone
Other Attendees
Fugro
St. Louis County
St. Louis County
Les Bevin – telephone
Melisa McLean – absent
Jeanne Jennings-Jimenez – absent
Columbia Public Schools
Missouri Department of Conservation
City of St. Charles
City of Kansas City, Missouri- Water
Services Department
Laura Estabrooks – absent
Tony Spicci – present
Chuck Lovelace – telephone
Michael Richey – telephone
3. Approval of Minutes: June minutes available on the web site.
Will be up for approval at the July meeting
4. MGISAC Administration
4.1 Missouri OGI Report — Tracy Schloss
 No Report –
4.2 MSDIS Report – Tom Vought
 Currently working with ESRI to see if Open Portal will be advantageous for
MSDIS
 MSDIS monthly summary located on the attached document
4.3 Treasurer’s report — Tim Donze
Previous balance $25,657.59
Income $0.00
Paid Expense: N/A
Ending balance $25,657.59
Encumbered Expense:
Recognition Plaques $148.40
Balance available $25,209.19
4.4 Membership report — Wiley Howell
 Vote on Boone County Fire Protection District membership was unanimously
approved to join the Council
4.5 By-laws — Joe Carter
 Joe refreshed everyone on the effects of abstaining from a vote
o A vote of abstantation is neither a “yes” or “no” vote but has the effect of
a no vote on an election.
o Abstaining from a vote could have an impact on future elections.
5. Discussion Topic/Presentation
6. Committee Reports
6.1 Data Development — Unfilled Chair
6.2 Education — Joe Carter & Chris Barnett
 No Report
6.3 Local Government — Melissa Johnson
 No Report
6.4 Marketing and Communications — Jason Warzinik
 No Report
6.5 Outreach — Tim Donze
 A Southwest Missouri GIS Workshop is scheduled for Novermber 1, 2018 at the
Carthage Water and Electric Plant in Carthage, Missouri
 An invitation was given to anyone wishing to present at the workshop
 MOGIS 2019 Conference
 Rebecca Sucher with the Botanical Society has been slated as the keynote
speaker
 Vendor pricing information will be added to the conferences website soon
 Registration (Link) for the Metadata Workshop scheduled on August 15th in
Columbia, Missouri is now open:
 Registration will be open soon for the SEMO GIS Symposium held on September
19th
6.6 Strategic Planning — Colin Duewell
 A meeting will be setup in the near future to discuss the 2019-2020 strategic plan
7. Liaison Reports
7.1 MAGIC Consortium — Steve Marsh
 Symposium will be in Omaha or Des Moines April 21-23, 2020
7.2 National States Geographic Information Council — Tony Spicci
 Annual conference in Duluth, MN
 Emphasis on getting the GDA passed through legislation
 3DEP program survey needs deadline is COB July 31th
8. Cooperating Agency/Organization Reports
8.1 NRCS — Marty Comstock
 2018 NAIP for Missouri has been funded
8.2 USGS — David Nail
 David thanked everyone who has completed the 3DEP survey
 LiDAR collection in South Central Missouri is on schedule
 Approximately 16,000 total square miles collected by 2 contractors
 Contractor 1 – 5,000 Sq mi 76% complete
 Contractor 2 – 11,500 Sq. mi 64% complete
 Data will not be availabel until 2019
8.3 Missouri Resource Assessment Partnership — Diane True
 No Report
8.4 Missouri Mappers Association — Melissa Johnson
 Time to register for the 2018 Conference Aug 7-10 Link
8.5 Missouri Society of Professional Surveyors — Jon Cole
 NGS is requesting comments for the “Notice of proposed change to the State
Plane Coordinate System in 2022”
 Two main options
 3+1 Zones – Continue with the 3 zones with an additional
statewide projection
 22+3 – Create 22 zones plus a zone for St. Louis, Kansas City and
a statewide projection
 Two documents titled “Options for a State Plane Coordinate System of
2022” and “NGS Feedback” at the end of this document offer more
information on the topic
9. Round table Discussion
 Jennifer Bowden – Camden, Miller and Morgan County looking for traffic counts
to determine the types of traffic traveling through those areas
 Joe Carter –
 Historic US Highway 66 had a ribbon cutting on the new bike route that
follows the bike route. The new route will be placed on the next MODOT
maps.
 MODOT will be creating statewide aeronautical chart in house with the
next release
 MODOT would like to look at roads that are regionally significant with
low ADT values for future funding
10. Next meeting: August 9, 2018, 10:30 a.m., MDC Central Regional Office and Conservation
Research Center 3500 E Gans Road Columbia, MO 65201
Meeting adjourned at 11:20 a.m.
MSDIS Update – June 2018
New Data
2018 Ambulatory Surgical Centers June Update
2018 Federally Qualified Health Center Locations June Update
2018 Local Public Health Agencies June Update
2018 Rural health Clinics June Update
2018 Public Schools
2018 Adult Daycare June Update
2018 WIC Satellite Offices June Update
Open Data Portal
We continue to work with ESRI on improving the MSDIS Open Data Portal. During one of the new data
uploads in June, the MSDIS Open Data Portal could not successfully connect with the MSDIS ArcGIS
Online page in order to harvest the data. Furthermore, we noticed that some layers that had been
added to the MSDIS Open Data Portal were no longer correctly configured for deployment despite
nothing having been changed. In order to isolate the failure, all data layers were removed from the
MSDIS Open Data Portal. Layers were then re-added, one-by-one, to ensure that everything that
SHOULD be available via Open Data IS available.
We have contacted ESRI about this issue and were told that other Open Data users have noticed similar
problems. ESRI Open Data experts are also investigating how we can server out more complicated
datasets through Open Data, such as Missouri Census Blocks.
Investigating options for adding MSDIS Twitter feed to Open Data Portal.
MSDIS Web Site
Added shortcut links to the Open Data Portal, Missouri Map, and MSDIS Data Archive to the sidebar of
the website so that all of the data download options are always one click away.
Investigating options for adding data search options to MSDIS website. Current most likely candidate
would functionally be a metadata search, which would require updating all MSDIS metadata files to
include new download urls.
Removed general search bar from MSDIS website since there are no longer nested data pages hardcoded
into the site architecture.
MSDIS Downtime
01 June 2018 – MSDIS services were interrupted along with the rest of the Mizzou computing network
due to continued work on improving the Dept of IT’s primary firewall. This outage, which was of a
similar nature to the outage at the end of May, lasted for over an hour and interrupted all Mizzou
networks, devices, and campuses.
MSDIS Data Wish List
While MSDIS is always happy to distribute any new data, based on requests from our users, GRC map
requests, and the overall state of the data catalog, acquisition of the following datasets are of particular
interest:
Missouri School Districts
Missouri Voting Districts
Missouri Contour Lines
Missouri Rest Stops
Notes on MSDIS Server Stats
Starting with the May 2018 Usage Stats, the following traffic is being excluded from the monthly reports
to give a clearer view of actual use:
 All traffic from MSDIS desktop workstation IP Addresses
 All traffic identified as originating from the Russian Federation*
Please note that the excluded traffic still appears in the raw server logs made available through the
MSDIS Data Archive.
*Excluded from the Data Archive stats ONLY, due to the fact that Russian traffic has not been a
significant component to either the Imagery server or the Map server)
MSDIS June 2018 Usage Stats
Image Server
Hits by Month
Month Hits Page views
Feb-18 3745122 3734059
Mar-18 89795 87408
Apr-18 3621003 3616352
May-18 3885250 3883809
June-18 3481356 3480325
Top Five Hits by Directory*
Pages/directories Hits Hits (%) Page views
/arcgis/rest/services/LGov/ 962158 60.1 962158
/arcgis/rest/services/MSDIS/ 562673 35.2 562673
/arcgis/rest/services/Map/ 39218 2.5 39215
/arcgis/rest/services/LiDAR/ 33502 2.1 33501
/arcgis/rest/services/2015Flood/ 474 0 474
Top Five Hits within LGov Directory*
Pages/directories Hits Hits (%) Page views
/arcgis/rest/services/LGov/DOQQ2015_EastWestGateway_6inch/ 330260 34.3 330260
/arcgis/rest/services/LGov/DOQQ2015_WesternMissouri_18inch/ 114475 11.9 114475
/arcgis/rest/services/LGov/StFrancois_4inch_9inch_composite/ 110377 11.5 110377
/arcgis/rest/services/LGov/Perry_4inch_9inch_composite/ 100513 10.4 100513
/arcgis/rest/services/LGov/Washington2018_4inch_9inch_composite/ 100433 10.4 100433
Top Ten Hits by Region
Region Hits Hits (%) Page views
United States/MO/ 2038176 58.5 2037484
United States/(unknown city) 319237 9.2 319193
United States/IL/ 166303 4.8 166224
(unknown country)/(unknown city) 160644 4.6 160628
United States/CO/ 141296 4.1 141288
United States/AR/ 103059 3 103052
United States/IA/ 101100 2.9 101091
United States/GA/ 69193 2 69185
United States/CA/ 54166 1.6 54088
Canada/ON/ 42976 1.2 42975
Top Ten Hits by City
City Hits Hits (%) Page views
United States/MO/Jefferson City 1065919 30.6 1065723
United States/(unknown city) 319237 9.2 319193
United States/MO/Lohman 315134 9.1 315094
United States/MO/Saint Louis 200140 5.7 200020
(unknown country)/(unknown city) 160644 4.6 160628
United States/CO/Fort Collins 136961 3.9 136961
United States/AR/Russellville 98804 2.8 98797
United States/IA/Bondurant 92368 2.7 92363
United States/IL/Normal 74296 2.1 74296
United States/GA/Tucker 66370 1.9 66364
Top Ten Hits by Client IP
Client IP Hits Hits (%) Page views
168.166.124.100 602105 17.3 601977
168.166.80.243 268269 7.7 268222
168.166.48.1 138750 4 138732
168.166.193.254 119606 3.4 119602
173.218.180.174 98724 2.8 98717
216.81.237.137 92368 2.7 92363
168.166.48.84 80004 2.3 80004
65.119.141.114 72844 2.1 72844
12.129.64.197 66351 1.9 66345
64.82.236.62 29645 0.9 29645
Top Ten Hits by Referrer
Client IP Hits Hits (%) Page views
(no referrer) 1761052 50.6 1760486
https://semorpc.maps.arcgis.com/ 407433 11.7 407433
http://jeffcomo.maps.arcgis.com/ 305240 8.8 305240
http://traveler.modot.mo.gov/ 218267 6.3 218267
http://tmsmaps/ 189381 5.4 189381
http://www.esri.com/ 92303 2.7 92224
https://msdis.maps.arcgis.com/ 67286 1.9 67286
http://www.dnr.mo.gov/ 48559 1.4 48559
http://semorpc.maps.arcgis.com/ 47540 1.4 47540
https://dallasgis.integritygis.com/ 46657 1.3 46657
*Please note that Image Server views for this month were divided equally between guests using the rest
directory (shown in the charts below) and guests going directly to the services directory (who used
MSDIS primarily for NAIP imagery). These charts, then, represent approximately half of all Image Server
users.
Map Server
Hits by Month
Month Hits Page views
Apr-18 143498 129330
May-18 148321 137798
June-18 193976 186678
Top Five Hits by Directory
Pages/directories Hits Hits (%) Page views
/arcgis/rest/services/Administrative_Boundaries/ 54233 39.4 54232
/arcgis/rest/services/Transportation/ 16277 11.8 16277
/arcgis/rest/services/Geological_Geophysical/ 15630 11.4 15630
/arcgis/rest/services/TIGER_Data/ 12819 9.3 12818
/arcgis/rest/services/Water_Resources/ 11580 8.4 11580
Top Five Hits within Administrative_Boundaries
Pages/directories Hits Hits (%) Page views
MO_2018_County_Boundaries/ 46896 86.5 46895
MO_2016_Dept_of_Natural_Resources_Land_Boundaries/ 1793 3.3 1793
MO_2018_Public_Land_Survey_System/ 1775 3.3 1775
MO_2017_Missouri_Department_of_Conservation_Lands/ 991 1.8 991
MO_2018_State_Boundary/ 497 0.9 497
Top Ten Hits by Region
Region Hits Hits (%) Page views
United States/MO/ 66612 34.3 60437
United States/NJ/ 17416 9 17378
(unknown country)/(unknown city) 13231 6.8 13148
United States/TX/ 11852 6.1 11841
United States/DE/ 11624 6 11624
United States/(unknown city) 11469 5.9 11320
United States/CA/ 10814 5.6 10457
United States/IN/ 6976 3.6 6931
United States/MA/ 5695 2.9 5695
United States/WA/ 4608 2.4 4605
Top Ten Hits by City
City Hits Hits (%) Page views
United States/MO/Columbia 31237 16.1 26201
United States/NJ/Woodbridge 15532 8 15532
(unknown country)/(unknown city) 13231 6.8 13148
United States/DE/Wilmington 11623 6 11623
United States/(unknown city) 11469 5.9 11320
United States/TX/Houston 10306 5.3 10306
United States/MO/Saint Louis 8582 4.4 8529
United States/CA/Cupertino 6636 3.4 6337
United States/IN/Evansville 6339 3.3 6321
United States/MO/Jefferson City 5172 2.7 5018
Top Ten Hits by Client IP
Client IP Hits Hits (%) Page views
128.206.12.147 27687 14.3 22777
66.151.131.6 5897 3 5897
107.197.223.51 5755 3 5755
216.135.32.250 5011 2.6 4993
52.204.32.78 4010 2.1 4010
34.237.0.227 3480 1.8 3480
54.152.234.95 2649 1.4 2649
52.23.174.174 2587 1.3 2587
173.216.125.224 2399 1.2 2399
18.209.31.87 2322 1.2 2322
Top Ten Hits by Referrer
Client IP Hits Hits (%) Page views
(no referrer) 110319 56.9 104504
https://msdis.maps.arcgis.com/ 57736 29.8 57736
https://data-msdis.opendata.arcgis.com/ 11314 5.8 11314
https://mcoffman.maps.arcgis.com/ 5793 3 5793
http://mophep.maps.arcgis.com/ 1722 0.9 1722
http://msdisweb.missouri.edu/ 1399 0.7 541
https://www.arcgis.com/ 1326 0.7 1326
http://www.arcgis.com/ 973 0.5 973
http://geoportal.missouri.edu/ 772 0.4 174
http://fema.maps.arcgis.com/ 255 0.1 255
MSDIS Data Archive
Hits by Month
Month Hits Page views
Apr-18 133436 129978
May-18 59093 57510
June-18 99763 98741
Top Five Hits by Directory
Pages/directories Hits Hits (%) Page views
/archive/Missouri_Vector_Data/ 41857 43.3 41823
/archive/Missouri_Elevation_Data/ 20584 21.3 20584
/archive/metadata_gos/ 8688 9 8688
/archive/Missouri_Imagery/ 8657 9 8657
/archive/MSDIS_Misc_Data/ 4916 5.1 4911
Top Five Hits within Vector Data Directory
Pages/directories Hits Hits (%) Page views
/archive/Missouri_Vector_Data/census1990/ 20572 49.1 20572
/archive/Missouri_Vector_Data/census2000/ 6946 16.6 6946
/archive/Missouri_Vector_Data/census2010/ 3174 7.6 3174
/archive/Missouri_Vector_Data/county/ 1732 4.1 1732
/archive/Missouri_Vector_Data/tiger2004/ 1728 4.1 1728
Top Ten Hits by Region
Region Hits Hits (%) Page views
United States/NJ/ 39509 39.6 39481
United States/CA/ 11012 11 10899
United States/WA/ 9825 9.8 9814
United States/DE/ 9294 9.3 9284
United States/MA/ 9291 9.3 9283
United States/MO/ 9130 9.2 8782
(unknown country)/(unknown city) 6541 6.6 6467
Cote D’Ivoire/(unknown city) 1641 1.6 1638
United States/(unknown city) 1019 1 911
United States/MI/ 313 0.3 309
Top Ten Hits by City
City Hits Hits (%) Page views
United States/NJ/Woodbridge 39473 39.6 39456
United States/WA/Seattle 9300 9.3 9300
United States/DE/Wilmington 9294 9.3 9284
United States/MA/Cambridge 9284 9.3 9278
United States/CA/Mountain View 7214 7.2 7157
(unknown country)/(unknown city) 6541 6.6 6467
United States/MO/Columbia 5054 5.1 5023
United States/CA/Palo Alto 3200 3.2 3199
United States/MO/Saint Louis 2560 2.6 2463
Cote D’Ivoire/(unknown city) 1641 1.6 1638
Top Ten Hits by Client IP
Client IP Hits Hits (%) Page views
54.86.17.24 35530 35.6 35530
18.206.198.119 9257 9.3 9257
52.205.157.15 9209 9.2 9209
107.23.92.93 9172 9.2 9172
128.206.111.125 4937 4.9 4937
54.210.45.175 2576 2.6 2576
128.252.33.1 2275 2.3 2246
213.150.217.186 1641 1.6 1638
66.249.69.53 1609 1.6 1601
66.249.69.55 1276 1.3 1270
Top Ten Hits by Referrer
Client IP Hits Hits (%) Page views
(no referrer) 94122 94.3 93623
http://msdis-archive.missouri.edu/ 4415 4.4 3895
http://www.msdis.missouri.edu/ 1090 1.1 1090
http://msdis.missouri.edu/ 85 0.1 85
https://www.google.com/ 26 0 26
http://www.google.com/ 14 0 14
https://slack.com 2 0 0
http://data-msdis.opendata.arcgis.com/ 2 0 2
https://t.co/ 1 0 1
http://fema.maps.arcgis.com/ 1 0 1

Options for a State Plane Coordinate System of 2022
In 2022, the Missouri State Plane Coordinate System is going to change. The current
horizontal datum, the North American Datum of 1983 (NAD 83), and vertical datum, the North
American Vertical Datum of 1988 (NAVD 88) have shortcomings. “Specifically, NAD 83 is
non-geocentric by about 2.2 meters. Secondly, NAVD 88 is both biased (by about one-half
meter) and tilted (about 1 meter coast to coast) relative to the best global geoid models available
today” (US Department of Commerce). So a new horizontal datum and a new vertical datum are
coming in 2022. Along with a new horizontal datum, states will have new state plane coordinate
systems, State Plane Coordinate System of 2022 (SPCS2022). This article will focus on options
concerning SPCS2022.
National Oceanic and Atmospheric Administration’s (NOAA) National Geodetic Survey
(NGS) recently posted on the Federal Register the “Notice of proposed change to the State Plane
Coordinate System; request for comments.” NGS has developed a draft policy and procedures
that propose defining characteristics and requirements for the State Plane Coordinate System of
2022 (SPCS2022). These documents also provide mechanisms for user input on initial design of
SPCS2022 and subsequent changes. NGS is inviting written comments from stakeholders on the
draft SPCS2022 policy and the use of “special purpose” zones. These zones could include urban
areas such as St. Louis and Kansas City. These urban areas span across different state plane
coordinate zones and could benefit from a special zone that covers the entire urban area. NGS
will accept comments from stakeholders until Friday, August 31, 2018. The stakeholders in
Missouri include: state GIS or cartographer’s office, Land Survey Program (LSP), Missouri
Department of Transportation (MoDOT), state professional surveying and engineering societies,
and universities that perform geospatial education or research.
One option available with SPCS2022, not available with previous state plane coordinate
systems, is the option to use low distortion projection zones, or LDP zones. “The term ‘low
distortion’ refers to minimizing the linear horizontal distortion from two effects: 1) represent a
curved surface on a plane and 2) departure of the elevated topography from the projection
surface due to variation in topographic height of the covered area” (Armstrong). According to
Michael Dennis, NGS Geodesist and owner of Geodetic Analysis, “Projected coordinate
systems are distorted – it is a Fact of Life. Linear distortion is the difference in distance between
a pair of projected (map grid) coordinates and the true horizontal ‘ground’ distance on the
surface of the Earth.” Dennis adds, “Although this distortion cannot be eliminated, it can be
minimized using Low Distortion Projections (LDPs).” The current Universal Transverse
Mercator (UTM) and the State Plane coordinate projections have substantial distortion.
Several states have implemented LDP zones. Some are single county projections; others
are multi-county projections. While researching LDP zones and their possible benefits for
Missouri surveyors, the LSP discovered that MoDOT had been looking into LDP zones for their
projects. In 2017 discussions began between the Land Survey Program and MoDOT Land
Surveyors regarding the design of an LDP system on a county by county basis for MoDOT’s
projects. The goal was to create smaller zones, minimizing the distortion to a level in which the
grid coordinates and ground coordinates would be considered the same in most surveying
applications. After completing the rigorous design, the project would be thoroughly tested by
MoDOT and the LSP.
The LDP would also eliminate localizing or site calibration thus improving surveying
efficiency for MoDOT and their contractors. The original plan for the LDP zones was to add it
as another option to the existing three-zone system.
In April of this year, NGS released a notice identifying LDP zones as a viable coordinate
system to replace the current three-zone system. However, linear distortion has to be between 20
and 50 ppm. The original goal of LSP and MoDOT was to keep the linear distortion minimal,
preferably under 20 ppm for most of the area of a zone. This would ensure LDP coordinates are
within the accuracy requirements of Missouri Survey Standards. Current NGS draft policy
requires the following if the state requests LDP zones:
 NGS will allow only two layers of Coordinate Systems in the current Draft Policy,
excluding special purpose zones.
 Low-distortion zones will replace the current three-zones (a state can have one or the
other, not both).
 NGS will create a single statewide zone as a second layer for GIS users.
 States create their own LDP zones subject to NGS approval.
 LDP zones will be designed for a linear distortion range between 20-50 ppm utilizing
a minimal number of zones. Approximately 20 zones are sufficient to obtain 20-50
ppm linear distortion for Missouri according to NGS.
 All stakeholders will have to agree to use the LDP zones as the basis for SPCS2022 if
registered with NGS.
Should Missouri decide not to register the LDP, NGS will use default definitions, which are the
same three-zones Missouri now enjoys with the following modifications:
 The linear distortion will be evaluated at the topographic surface, not the ellipsoid
surface, as is the current case.
 The three-zones will be evaluated according to topography and population and
optimized to create the lowest distortion for each zone, as a result, likely changing the
scale factor and the position of the central meridian for each zone.
 The position where geodetic north equals grid north may change within each zone.
 NGS may add “special purpose” zones for Kansas City and St. Louis.
 NGS may create a single statewide zone as a second layer for GIS users.
With this scenario, Missouri surveyors would not be able to get low-distortion
coordinates directly from OPUS. However, after some investigation into the practices of states
currently using LDP zones, there is a procedure to get these projections and their parameters as
an option in data collector software once the LDP zones are finalized. So, does the good
outweigh the bad?
For MoDOT surveyors, engineers and designers, the answer is easy, yes. Placing the
parameters of the county in the data collector is the most difficult part of the project, which will
be added as an option in the collector. In theory, the coordinate collected in the initial design and
engineering phase will be used in the project stakeout and machine control during construction
without change. This makes sense for countywide GIS applications, especially on the cadastral
layer. It seems intuitive that once surveyors, GIS users, designers, and engineers become
familiar with the LDP system, they will adopt it.
Will dividing Missouri into 20 zones with linear distortion of 20 to 50 ppm suffice for
MoDOT? Will it suffice for property boundary surveys? Before considering using the 20-zone
option as the configuration for Missouri, these questions need answered. Based on the Land
Survey Program’s preliminary results of 14 countywide LDP zones, it is common to have linear
distortion of 15 to 20 ppm or less on 90-95% of each zone. Using countywide zones definitely
reduces the linear distortion. The NGS requirement of larger multi-county zones creates larger
distortions.
Other questions for consideration: Are special purpose zones in Kansas City and St.
Louis beneficial? Do statewide GIS users want a single statewide zone as a second layer?
The Missouri Land Survey Program plans to comment on the NGS draft policy
concerning State Plane Coordinates 2022. As a State, all these stakeholders should ban together
asking for adjustment and modification of the NGS policy to meet the needs of surveyors,
engineers, GIS users and other state plane coordinate users within Missouri. Missouri can also
team up with like-minded states to improve the national policy. Submit any comments and
preferences to landsurv@mda.mo.gov or call (573) 368-2300.
This is not a comprehensive summary of the SPCS2022 Policy and Procedures. This
document provides a brief overview to highlight the items that need further discussion before
formulating and submitting comments to NGS as Missouri stakeholders. Below are the
deadlines that are in the NGS Draft Policy that would have to be met depending on which
route/routes we take.
 Deadline for comments to NGS’s Draft Policy no later than August 31, 2018
 Requests for zones designed by NGS or proposals for zones designed by contributing
partners must be received by NGS no later than December 31, 2019
 For NGS-approved proposed designs by contributing partners, final defining parameters
must be received by NGS no later than December 31, 2020
 Confirmation of final design characteristics and computations will be provided by NGS
to stakeholders and contributing partners no later than December 31, 2021
For additional information on SPCS2022, see the following websites:
Federal Register Notice
https://www.federalregister.gov/documents/2018/04/18/2018-08141/policy-and-proceduresdocuments-for-the-state-plane-coordinate-system-of-2022
Draft Policy
https://www.ngs.noaa.gov/INFO/Policy/files/DRAFT_SPCS2022_Policy.pdf
Draft Procedures
https://www.ngs.noaa.gov/INFO/Policy/files/DRAFT_SPCS2022_Procedures.pdf
References
Armstrong, Mark L., Ken Bays, Dennis Michael, and Joseph Thomas. Oregon Coordinate
Reference System. Version 3.01. Oregon Department of Transportation Highway Division
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