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MonumentLocation
002
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2543967.960005
7023415.190049
7052393.760045
1
0.001
Projected
GCS_North_American_1983
Linear Unit: Foot_US (0.304801)
NAD_1983_StatePlane_Texas_North_Central_FIPS_4202_Feet
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ItemDescription
Version 6.2 (Build 9200) ; Esri ArcGIS 10.7.1.11595
Monument Locations
554.300000
709.749000
1
-96.766473
-96.622725
33.003447
32.921747
Point features representing the monument in the city of Richardson Tx.
<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN>The values for the City of Richardson GPS Control Network were established using Static data collection procedures during the month of February 2020. </SPAN><A href="http://www.cpyi.com/"><SPAN>CP&Y, Inc</SPAN></A><SPAN>., in conjunction with the City of Richardson set all 3-1/4 inch domed aluminum monuments throughout the City at designated key areas. All fieldwork and post processing were performed by CP&Y, Inc. Final data sheets were published after consultation with the City of Richardson. </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Horizontal State Plane Coordinates (SPC) are on the Lambert Projection System — NAD83 (CORS96) — Texas Coordinate System (Texas North Central Zone 4202). A position was derived using the National Geodetic Service (NGS) Online Positioning User Service (OPUS) position for Monument No. 116 (previously City of Richardson Monument H7) near the center of Richardson, as a base point. All other monuments within the City of Richardson were tied to a constellation of multiple observations (baselines) using 3 GPS receivers from this base point location. The vectors were assembled into a three-dimensional network least squares model using the Trimble Business Center® software. A minimally constrained adjustment proved the integrity of the vector data. The positions of four Continuously Operating Reference Stations (CORS) in the NGS network were included in the project as control and the vectors from each of these stations were used to develop coordinates for Monument No. 116. The resulting coordinate values for all stations matched the OPUS solution and separate vector data corrected from the Trimble RTKNet. The dual-frequency vectors were added to the project to obtain coordinates for all stations for publication. </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Vertical values are NAVD88 elevations and validated by the City of Richardson Control Network generated in 1990, OPUS, and Trimble RTKNet datums. The 1990 City of Richardson Control Network was previously adjusted to the Federal Emergency Management Agency (FEMA) with GPS Static observations on U.S. Coast & Geodetic Survey Monuments M923 and S923. All GPS derived elevations were computed using a Geoid Model (GEOID12B). </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>In summary, CP&Y, Inc. provided the City of Richardson with a GPS Control Network based on the position of Monument No. 116 and its elevation verified from the City of Richardson 1990 Control Network. All data sheets will show State Plane Coordinates in both Geodetic and Grid formats. The horizontal data is referenced to NAD83 Texas North Central Zone- 4202, in both U.S. Survey feet and meters. Vertical data is referenced to NAVD88 elevations. </SPAN></P></DIV></DIV></DIV>
CP&Y, Inc.
monuments
Richardson Tx
survey
monument locations
This data product is free and open access for personal use and adaptation. City of Richardson is not held liable for data accuracy. It is for informational purposes and may not have been prepared or suitable for legal, engineering, or surveying purposes. It does not represent an on-the-ground survey and represents only the approximate relative location or property boundaries.
Feature Class
0.001
dataset
EPSG
5.3(9.0.0)
25
Simple
FALSE
25
TRUE
TRUE
MonumentLocation
Feature Class
25
OBJECTID
OBJECTID
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Shape
Geometry
4
0
0
Feature geometry.
Esri
Coordinates defining the features.
MonumentNumber
Monument #
Integer
4
10
0
NorthingY
Northing (Y)
Double
8
38
8
EastingX
Easting (X)
Double
8
38
8
Elevation
Elevation (Ft)
Double
8
38
8
MonumentName
Monument Name
String
20
0
0
MonumentDocument
Monument Document
String
300
0
0
LIFECYCLE
Lifecycle Status
String
20
0
0
created_user
created_user
String
255
0
0
created_date
created_date
Date
8
0
0
last_edited_user
last_edited_user
String
255
0
0
last_edited_date
last_edited_date
Date
8
0
0
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