WORKING ON A LOCAL GRID HYPACK 2013. In HYPACK ® … Lat-Long on WGS-84 SurveyingonWGS-84? Local Datum X-Y on Projection DatumTransformation GridConversion.

WORKING ON A LOCAL WORKING ON A LOCAL GRIDGRID

HYPACK 2013HYPACK 2013

In HYPACKIn HYPACK®® … …

Lat-Long on Lat-Long on WGS-84WGS-84

SurveyingSurveyingonon

WGS-84?WGS-84?

Lat-Long onLat-Long onLocal DatumLocal Datum

X-Y onX-Y onProjectionProjection

DatumDatumTransformationTransformation

GridGridConversionConversion

GPS

No

Yes

RS-232

X-Y onX-Y onLocal GridLocal Grid

Local GridLocal GridLocal GridConversionConversion

Click me!

Working on a Local GridWorking on a Local Grid

Point 1 Point 2

UTM XUTM X 562,000.000562,000.000 563,000.000563,000.000

UTM YUTM Y 3,245,000.0003,245,000.000 3,246,000.0003,246,000.000

Local Grid XLocal Grid X 10,000.0010,000.00 10,940.70910,940.709

Local Grid YLocal Grid Y 10,000.0010,000.00 11,063.27811,063.278

You need two points in your area where you know:You need two points in your area where you know:

X-Y on your Local GridX-Y on your Local Grid

X-Y on a normal HYPACKX-Y on a normal HYPACK®® Project Grid, such as UTM, Project Grid, such as UTM, State Plane, UKNG, etc.State Plane, UKNG, etc.

GEODETIC PARAMETERS: GEODETIC PARAMETERS: Setup for Local GridSetup for Local Grid

Set GEODETIC PARAMETERS to a Grid/Zone that HYPACK knows about (e.g.: UTM).

Next, change the ‘Grids’ entry to “None”.

Click the ‘Local Grid Adjustment’ check box and then the ‘Local Grid’ button.

LOCAL GRID: WindowLOCAL GRID: Window

Enter the ‘World’ and ‘Local’ coordinates, select your origin and have the program compute the rotation, translation and scale.

Local Grid: ExampleLocal Grid: Example

Point 1

UTM X 562,000.00

UTM Y 3,245,000.00

Local Grid X 10,000.00

Local Grid Y 10,000.00

Point 2

UTM X 563,000.00

UTM Y 3,246,000.00

Local Grid X 10,940.709

Local Grid Y 11,063.278

Checking it in GRID CONVERSIONChecking it in GRID CONVERSION

Point 1Point 1UTM Zone 17.UTM Zone 17.

X = 562,000.000X = 562,000.000Y = 3,245,000.000Y = 3,245,000.000

UTM Lat-Long:UTM Lat-Long:Lat = N29Lat = N29° 19.953279’° 19.953279’Lon = W80° 21.684083’Lon = W80° 21.684083’

Local Grid CoordinatesLocal Grid CoordinatesX = 10,000.000X = 10,000.000Y = 10,000.000Y = 10,000.000