Lat/Long to Eastings/Northings Conversion

[Ben Terry]

I've explored high & low how to do convert a large set of lat/long coordinates (e.g. 57.1436/-2.0969) into Eastings & Northings in MapInfo v12 but have hit a brick wall so far. I don't have the Coordinates Conversion tool so maybe this is the piece of kit I need.

Can somebody please tell me the quickest way to convert? Thanks!

[Tony Pilkington]

Assuming your set of coordinate pairs is in a text file, open mapinfo and use open table selecting the ‘text file’ option.

This will create a tab file for the .txt file.

You now need need to save the tab file under a different (but simple name). This will create a .dat file under the new name.

Use table-maintenance for the new tab file to set the column names (Lat & Long say) and to create two extra columns of type float called Northing and Eastings.

Set the new table to mappable and the coordinate system to WGS84 (I suppose)

Use table create points using Long & Lat (ie X and Y) to create points in the map

Map from this table

Save a copy of this table in your local coordinate system (OSGB?) ie as OS_Points.

Now using using options-show mapbasic window

Type in: Set coordsys window frontwindow()

Type in: Update OS_POints set Eastings = centroidx(obj)

Type in: Update OS_POints set Northings = centroidy(obj)

Save table OS_Points with a sensible name.

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[David Reid]

The "quickest" way or "down and dirty"... save your file with a projection that uses Etngs/Nrthgs, or I think just set your CoordSys of your current view to the appropriate pejection and coordinate system.

 

You may want to go ahead and add a couple decimal value columns to populate your eastings and northings with when you run an update (ie Update Selection CentroidX(obj) and CentroidY(obj) ), MI will use the appropriate coordinate values.

 

HTH

Dave

----- Original Message -----

From: Ben Terry

To: mapi...@googlegroups.com

Sent: Monday, April 13, 2015 11:09 AM

Subject: [MI-L] Lat/Long to Eastings/Northings Conversion

I've explored high & low how to do convert a large set of lat/long coordinates (e.g. 57.1436/-2.0969) into Eastings & Northings in MapInfo v12 but have hit a brick wall so far. I don't have the Coordinates Conversion tool so maybe this is the piece of kit I need.

Can somebody please tell me the quickest way to convert? Thanks!

--

[KTG Infotech]

open the text file as a tab file choosing the lat/long as projection as 1st case.

Later create 2 more fields and update  the co-ords as per your desired projections.

See if that works.

Good Luck.

Kalai Selvan.K

CAD/GIS (Mineral Exploration) Drafting/Digitizing

Geological Mapping, Data Integration, Map Digitizing, Analysis and Data Conversion
for Geochemistry,IP and Drill Collar logs
Skypes-kkalai.selvan

[Ben Terry]

Thanks very much. With new eyes this morning I spotted the easiest of easy mistakes which I just couldn't get my head round yesterday! The original Long/Lats were the wrong way round - so no wonder the projection was dumping them into the Indian Ocean!!

Thanks for your help.

Ben.

[grant]

if you also have discover can do also

[map1]

The Coordinate Extractor tool will do this. Does anyone know where it has gone in MapInfo 64 bit? Can I download it from somewhere?