Q. How do you convert between State Plane and Albers [using
Tralaine]? I know that Albers comes up as an option in User Defined Coordinate
Systems but what about the rest of the definition (e.g. origins)? -Candace B.
A. Using Tralaine, we convert from one coordinate
system to another; and all cooridnate systems are given unique names as we do with files
in a directory. There are several coordinate systems based on Albers. For example,
US48 is a NAD27 based Albers Equal Area coordinate system used for mapping the 48
states. USAK is an Albers Equal Area based coordinate system which is used to map
Alaska.
The Tralaine distribution contains over 1,000 coordinate system definitions. You
can convert from any one to another other by entering the name of the coordinate system on
the appropriate edit box on the conversion screen.
So, for example, to convert from Flordia East state planes to Albers, you would use
FL-E (Florida East) for the input coordinate system, and US48 (Albers Equal Area for the
48 states) as the output coordinate system.
Use the Coordinate System editor if you desire to see the origins etc associated with
the US48 coordinate system name. In Tralaine, you create these definitions, assign a name,
and then simply refer to the complete definition by name. You don't have keep
choosing/entering the origins and stuff like that.
Q. I would like some assistance in finding a source of
information on monuments (geodetic control points) in Westchester County, New York.
I have asked many people and looked long on the web. Any suggestions? - William B.
A. Well, we did some surfing on the web and found this
information at:
http://www.ngs.noaa.gov/CDROM/DScdromInfo.html
Geodetic Data Sheets contain this data. They sell for $50 (on CD) for the
northeast United States region:
CT, DE, DC, KY, ME, MD, MA, NH, NJ, NY, OH, PA, RI, VT, VA, and WV
To order:
NOAA, National Geodetic Survey, N/NGS12,
1315 East-West Highway, Station 9202
Silver Spring, MD 20910-3282
Phone: (301) 713-3242; Fax: (301) 713-4172
Mon.-Fri., 7:00 a.m. - 4:30 p.m. Eastern Time.
GEODETIC DATA SHEETS
NGS' principal information product is the data sheet, combining control point position
and height information in a single format. ASCII DATA SHEET FILES. The data sheet
includes:
The horizontal and vertical datums on which the control point information is based,
The horizontal coordinates, and ttheorthometric height for the point and the methods
used to determine these values,
The horizontal datum shift (NAD 83 minus NAD 27), and the vertical datum shift (NAVD 88
minus NGVD 29),
Modeled geoid height, ellipsoidal height, modeled gravity, and Laplace correction,
State plane coordinates and Universal Transverse Mercator coordinates,
[Here's what you were looking for]
A description of the mark’s location and how to reach
it, and a history of when the station mark was recovered, the condition in which it was
found, and updates to the station description prompted by the recoveries.
I think this is what you are looking for, right? I didn't find a location for
downloading individual county information. Looks like they lumped the whole Northeastern
US in one CD.
Good luck! Ann (Norm told me where to find it!)
[Editor's Note: Received the following input from a Casual Cartographer Subscriber]
In the above, the following url might have been given:
http://www.ngs.noaa.gov/datasheet.html
Select:
Retrieve a set of up to 100 data sheets from the NGS DataBase by area search
Enter the target Latitude and Longitude as shown, submit the query, and save the
results to a text file.
A word of warning about the monuments listed in this database. Many obsolete
monuments are listed and the database is always being updated. A particular current
monument may not have been recovered, since the recovery teams are not always
experienced. Also, the coordinates of many were taken from USGS Topographical
maps. Some examples from my own neighborhood follow.
The first is completely obsolete, Davis-Monthan Air Force Base relocated ts headquarters
and removed the flagpole in the early 1980's. The location given is inside a
building.
The second is a 120' tall water tank which was removed in the summer of 1980, correctly
listed as not found.
The third shows what can happen with poor recovery. The monument is one that I've
used for GPS work several times. The U.S. Power Squadron failed to recover it on
their first attempt and somebody showed them where it is located.
The NGS Data Sheet
DATABASE = Sybase ,PROGRAM = datasheet, VERSION = 5.71
Starting Datasheet Retrieval...
1 National Geodetic Survey,
Retrieval Date = DECEMBER 15, 1998
CZ0054
***********************************************************************
CZ0054 DESIGNATION - 3
CZ0054 PID - CZ0054
CZ0054 STATE/COUNTY- AZ/PIMA
CZ0054 USGS QUAD - TUCSON (1983)
CZ0054
CZ0054
*CURRENT SURVEY CONTROL
CZ0054 ___________________________________________________________________
CZ0054* NAD 83(1986)- 32 10 51. (N) 110
52 55. (W) SCALED
CZ0054* NAVD 88 -
799.55 (+/-2cm) 2623.2 (feet)
VERTCON
CZ0054 ___________________________________________________________________
CZ0054 GEOID HEIGHT- -29.04
(meters) GEOID96
CZ0054
CZ0054 VERT ORDER - SECOND CLASS 0 (See Below)
CZ0054
CZ0054.The horizontal coordinates were scaled from a topographic map and have
CZ0054.an estimated accuracy of +/- 6 seconds.
CZ0054
CZ0054.The NAVD 88 height was computed by applying the VERTCON shift value to
CZ0054.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
CZ0054.The vertical order pertains to the superseded datum.
CZ0054
CZ0054.The geoid height was determined by GEOID96.
CZ0054
CZ0054;
North East Units
Estimated Accuracy
CZ0054;SPC AZ C -
131,390. 310,930. MT
(+/- 180 meters Scaled)
CZ0054
CZ0054
SUPERSEDED SURVEY CONTROL
CZ0054
CZ0054 NGVD 29 -
798.92 (m)
2621.1 (f) COMPUTED 2 0
CZ0054
CZ0054.Superseded values are not recommended for survey control.
CZ0054.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
CZ0054.See file format.dat to determine how the superseded data were derived.
CZ0054
CZ0054_MARKER: DD = SURVEY DISK
CZ0054_SETTING: 30 = SET IN A LIGHT STRUCTURE
CZ0054_STAMPING: BM 3
CZ0054_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
CZ0054
CZ0054 HISTORY - Date
Condition Recov. By
CZ0054 HISTORY - UNK
MONUMENTED USE
CZ0054 HISTORY - 1945
GOOD NGS
CZ0054 HISTORY - 1948
GOOD NGS
CZ0054
CZ0054
STATION DESCRIPTION
CZ0054
CZ0054'DESCRIBED BY NATIONAL GEODETIC SURVEY 1945
CZ0054'IN DAVIS-MONTHAN FIELD.
CZ0054'AT DAVIS-MONTHAN AFB, AT THE FLAGPOLE AT THE SOUTH SIDE OF THE
CZ0054'HEADQUARTERS BUILDING, 0.8 FOOT SOUTH OF THE SOUTH EDGE OF THE POLE,
CZ0054'IN THE TOP OF THE CIRCULAR CONCRETE BASE, AND 0.8 FOOT NORTH OF THE
CZ0054'SOUTH EDGE OF THE BASE. A CORPS OF ENGINEERS, U. S. ARMY, STANDARD
CZ0054'DISK, STAMPED BM 3.
CZ0054
CZ0054
STATION RECOVERY (1948)
CZ0054
CZ0054'RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1948
CZ0054'RECOVERED IN GOOD CONDITION.
1 National Geodetic Survey,
Retrieval Date = DECEMBER 15, 1998
CZ1854
***********************************************************************
CZ1854 DESIGNATION - TUCSON WATER TANK NO P 1
CZ1854 PID - CZ1854
CZ1854 STATE/COUNTY- AZ/PIMA
CZ1854 USGS QUAD - TUCSON (1983)
CZ1854
CZ1854
*CURRENT SURVEY CONTROL
CZ1854 ___________________________________________________________________
CZ1854* NAD 83(1992)- 32 12 16.46161(N) 110 52
44.56043(W) ADJUSTED
CZ1854* NAVD 88
-
CZ1854 ___________________________________________________________________
CZ1854 LAPLACE CORR-
4.34
(seconds)
DEFLEC96
CZ1854 GEOID HEIGHT- -28.98
(meters)
GEOID96
CZ1854
CZ1854 HORZ ORDER - THIRD
CZ1854
CZ1854.The horizontal coordinates were established by classical geodetic
methods
CZ1854.and adjusted by the National Geodetic Survey in August 1993.
CZ1854
CZ1854
CZ1854.The Laplace correction was computed from DEFLEC96 derived deflections.
CZ1854
CZ1854.The geoid height was determined by GEOID96.
CZ1854
CZ1854;
North East
Units Scale Converg.
CZ1854;SPC AZ C - 134,021.633
311,182.395 MT 1.00001797 +0 33 10.9
CZ1854;UTM 12 - 3,563,117.809
511,399.451 MT 0.99960160 +0 03 52.1
CZ1854
CZ1854
SUPERSEDED SURVEY CONTROL
CZ1854
CZ1854 NAD 83(1986)- 32 12 16.45566(N) 110 52 44.55968(W)
AD( )
4
CZ1854 NAD 27 - 32 12
16.18002(N) 110 52 42.23752(W) AD( )
3
CZ1854
CZ1854.Superseded values are not recommended for survey control.
CZ1854.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
CZ1854.See file format.dat to determine how the superseded data were derived.
CZ1854
CZ1854_MARKER: 53 = ELEVATED TANK
CZ1854
CZ1854 HISTORY - Date
Condition Recov. By
CZ1854 HISTORY - 1971 FIRST
OBSERVED NGS
CZ1854 HISTORY - 19950110 MARK NOT FOUND
USPSQD
CZ1854
CZ1854
STATION DESCRIPTION
CZ1854
CZ1854'DESCRIBED BY NATIONAL GEODETIC SURVEY 1971 (WMJ)
CZ1854'THE STATION IS THE FINIAL KNOB ATOP THE TUCSON, WATER TANK NUMBER P1
CZ1854'THAT IS LOCATED NEAR THE INTERSECTION OF BEVERLY STREET AND 22ND
CZ1854'STREET IN THE SOUTHEAST SECTION OF THE CITY OF TUCSON. THE TANK IS
CZ1854'AN OBLATE SPHEROID IN SHAPE, SUPPORTED BY 12 STRUCTURAL STEEL
CZ1854'LEGS. IT IS 120 FEET IN HEIGHT.
CZ1854
CZ1854
STATION RECOVERY (1995)
CZ1854
CZ1854'RECOVERY NOTE BY US POWER SQUADRON 1995
CZ1854'MARK NOT FOUND.
1 National Geodetic Survey,
Retrieval Date = DECEMBER 15, 1998
CZ2380
***********************************************************************
CZ2380 DESIGNATION - D 61
CZ2380 PID - CZ2380
CZ2380 STATE/COUNTY- AZ/PIMA
CZ2380 USGS QUAD - TUCSON (1983)
CZ2380
CZ2380
*CURRENT SURVEY CONTROL
CZ2380 ___________________________________________________________________
CZ2380* NAD 83(1992)- 32 11 57.97573(N) 110 53
16.16355(W) ADJUSTED
CZ2380* NAVD 88 -
786.0 (meters) 2579.
(feet) VERTCON
CZ2380 ___________________________________________________________________
CZ2380 X -
-1,926,363.737
(meters)
COMP
CZ2380 Y -
-5,047,866.748
(meters)
COMP
CZ2380 Z
- 3,379,569.363
(meters)
COMP
CZ2380 LAPLACE CORR-
4.14
(seconds)
DEFLEC96
CZ2380 ELLIP HEIGHT- 757.18
(meters)
GPS OBS
CZ2380 GEOID HEIGHT- -29.02
(meters)
GEOID96
CZ2380
CZ2380 HORZ ORDER - FIRST
CZ2380 ELLP ORDER - FOURTH CLASS II
CZ2380
CZ2380.The horizontal coordinates were established by GPS observations
CZ2380.and adjusted by the National Geodetic Survey in August 1993.
CZ2380
CZ2380.The NAVD 88 height was computed by applying the VERTCON shift value to
CZ2380.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
CZ2380
CZ2380.The X, Y, and Z were computed from the position and the ellipsoidal
ht.
CZ2380
CZ2380.The Laplace correction was computed from DEFLEC96 derived deflections.
CZ2380
CZ2380.The ellipsoidal height was determined by GPS observations
CZ2380.and is referenced to NAD 83.
CZ2380
CZ2380.The geoid height was determined by GEOID96.
CZ2380
CZ2380;
North East
Units Scale Converg.
CZ2380;SPC AZ C - 133,444.277
310,360.194 MT 1.00001600 +0 32 53.8
CZ2380;UTM 12 - 3,562,547.721
510,572.701 MT 0.99960138 +0 03 35.2
CZ2380
CZ2380
SUPERSEDED SURVEY CONTROL
CZ2380
CZ2380 NAD 83(1986)- 32 11 57.97089(N) 110 53 16.16244(W)
AD( )
1
CZ2380 NGVD 29 -
785.3 (m)
2576. (f) GPS OBS
CZ2380
CZ2380.Superseded values are not recommended for survey control.
CZ2380.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
CZ2380.See file format.dat to determine how the superseded data were derived.
CZ2380
CZ2380_MARKER: DD = SURVEY DISK
CZ2380_SETTING: 4 = OBJECT SURROUNDED BY MASS OF CONCRETE
CZ2380_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
CZ2380_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR
CZ2380+SATELLITE: SATELLITE OBSERVATIONS - 1987
CZ2380
CZ2380 HISTORY - Date
Condition Recov. By
CZ2380 HISTORY - 1987
MONUMENTED USGS
CZ2380 HISTORY - 19950322 MARK NOT FOUND
USPSQD
CZ2380 HISTORY - 19950924
GOOD USPSQD
CZ2380
CZ2380
STATION DESCRIPTION
CZ2380
CZ2380'DESCRIBED BY US GEOLOGICAL SURVEY 1987 (SA)
CZ2380'THE STATION IS LOCATED AT THE SOUTH EDGE OF TUCSON, AT THE
CZ2380'NORTHWEST CORNER OF FREEDOM PARK.
CZ2380'OWNERSHIP--CITY OF TUCSON, BRUCE JOHNSON, WATER RESOURCES DIVISION,
CZ2380'TUCSON WATER, P.O. BOX 27210, TUCSON AZ 85726. FOR SITE
CZ2380'INFORMATION CONTACT STEVE ANDERSON, U.S. GEOLOGICAL SURVEY, PHONE
CZ2380'602-629-6223.
CZ2380'
CZ2380'TO REACH THE STATION FROM THE JUNCTION OF INTERSTATE HIGHWAY 10 AND
CZ2380'22ND ST IN TUCSON, GO EAST FOR 7.6 KM (4.75 MI) ON 22ND ST TO THE
CZ2380'INTERSECTION OF COLUMBUS BLVD. CONTINUE STRAIGHT AHEAD AND GO
CZ2380'EAST FOR 0.8 KM (0.5 MI) ON 22ND ST TO THE INTERSECTION OF SWAN
CZ2380'ROAD.
CZ2380'TURN RIGHT AND GO SOUTH FOR 0.8 KM (0.5 MI) ON SWAN ROAD TO THE
CZ2380'INTERSECTION OF 29TH ST.
CZ2380'TURN LEFT AND GO EAST FOR 0.4 KM (0.25 MI) ON 29TH ST TO THE
CZ2380'EXTENSOMETER AND STATION ON THE RIGHT.
CZ2380'
CZ2380'THE STATION IS A STANDARD USGS GAGING STATION DISK
CZ2380'STAMPED---D-61 1987---,
CZ2380'SET INTO THE TOP OF AN IRREGULAR MASS OF CONCRETE RECESSED
CZ2380'2 CM BELOW GROUND. LOCATED
CZ2380'43.59 METERS (143.0 FT) WEST-SOUTHWEST FROM THE APPROXIMATE CENTER
CZ2380'OF A PAVED DRIVE LEADING SOUTH INTO FREEDOM PARK,
CZ2380'31.24 METERS (102.5 FT) SOUTH FROM THE APPROXIMATE CENTER OF 29TH
CZ2380'ST,
CZ2380'24.29 METERS (79.7 FT) SOUTH-SOUTHWEST FROM A UTILITY POLE,
CZ2380'7.32 METERS (24.0 FT) NORTH-NORTHEAST FROM THE SOUTHEAST CORNER OF
CZ2380'A CHAIN LINK FENCE AROUND EXTENSOMETER AND
CZ2380'3.84 METERS (12.6 FT) EAST FROM THE NORTHEAST CORNER OF A CHAIN
CZ2380'LINK FENCE AROUND EXTENSOMETER.
CZ2380'
CZ2380'AVRA VALLEY, ARIZONA, SUBSIDENCE MONITORING, FEBRUARY-MARCH 1987.
CZ2380'
CZ2380'THIS STATION SUITABLE FOR GPS SURVEYS.
CZ2380'
CZ2380'DESCRIBED BY D.F. CALLAHAN.
CZ2380
CZ2380
STATION RECOVERY (1995)
CZ2380
CZ2380'RECOVERY NOTE BY US POWER SQUADRON 1995
CZ2380'MARK NOT FOUND.
CZ2380
CZ2380
STATION RECOVERY (1995)
CZ2380
CZ2380'RECOVERY NOTE BY US POWER SQUADRON 1995
CZ2380'RECOVERED IN GOOD CONDITION.
----------------
Regards,
Richard
dthought@azstarnet.com
----------------
We tried looking for a monument using the resource you suggested and found one close to
my home. Thanks for the suggestion.
Bill (William B.)
Do you have a question for Norm? Just ask him.
Check out The Casual Cartographer Archives for more Ask Norm
Q&A.
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