10 Replies Latest reply on Jul 28, 2010 8:46 PM by Hardolph

    Geographic to Grid coordinate

    rimutaka
      Hi,

      I have a large data in geographic coordinates.

      What is the easy way to convert it into grid coordinate?

      Cheers,
        • Re: Geographic to Grid coordinate
          MKennedy-esristaff
          Hi,

          I have a large data in geographic coordinates.

          What is the easy way to convert it into grid coordinate?

          Cheers,


          Hi,

          As long as you know the geographic coordinate system of the data and the projected coordinate system, you can use the Project Tool (ArcToolbox, Data Management, projections and transformations), or project the data on-the-fly (in memory) in ArcMap.

          Melita
          • Re: Geographic to Grid coordinate
            danielri
            The simplest method would be to run the PROJECT command (found in the Data Management Tools | Projections and Transformations toolbox) on your dataset. This will convert the shapefile or feature class to the select projection. To add fields in your attribute table 'showing' the new coordinates you would use the AddXY command to add fields named POINT_X and POINT_Y to your attribute table and calculate there values.

            If you are working with lines or polygons you could run the Quick Export tool to export to ungenerate the feature class into a flat ascii file such as KML or XML.

            Rich
            • Re: Geographic to Grid coordinate
              rimutaka
              Hi,

              I have tried to convert data into projected coordinate system but the coordinates still show as
              latitude and longitude instead of easting and northing.

              The main reason I am converting this data because i will use them with AutoCad application.

              Any tutorial about converting geographic to projected coordinate system?



              Cheers,
              • Re: Geographic to Grid coordinate
                opierreo
                Hi,

                Using of Projection tool from Toolbox is really easy:

                1. Input dataset or Feature class: browse or drag'n'drop your data here to convert
                (Input coordinate system field should show the current system of your data. If says Unkown, your data doesn't have any sys set up.)

                2. Output Dataset or Feature Class:
                Browse the location to save data and name it.

                3. Output coordinate system:
                Your desired coordinate system to convert your data

                4. Geographic transformation: if there's more than one method to convert between the original and target coordinate systems, you have to choose a method to process...

                That's all.
                For batch project, use Batch Projet tool from Toolbox. Works the same: set the same things for every dataset before process...


                However, you can find more information about these tools in ArcGIS Desktop or Online help... (As far as I know, there's no tutorial for this tool...)

                Hope this helps.
                • Re: Geographic to Grid coordinate
                  MKennedy-esristaff
                  Hi,

                  I have tried to convert data into projected coordinate system but the coordinates still show as
                  latitude and longitude instead of easting and northing.

                  The main reason I am converting this data because i will use them with AutoCad application.

                  Any tutorial about converting geographic to projected coordinate system?

                  Cheers,


                  Both Richard and Zoltan mentioned two gotchas but to re-iterate,

                  1. If you use the Define Projection tool, it updates the current coordinate system only. It won't change the data's coordinates.
                  2. Any coordinates stored in the attribute table are not updated when the data is (re)projected.

                  Hope this helps,
                  Melita
                  • Re: Geographic to Grid coordinate
                    rimutaka
                    Dear all,

                    I have followed suggestions from this thread but still was unsuccessful to convert geographic coordinate to projected coordinate systems.

                    Does someone have a formula (in Excel format) on how to convert "latitude - longitude" to "Easting -Northing"?

                    Cheers,
                    • Re: Geographic to Grid coordinate
                      Hardolph
                      Dear all,

                      I have followed suggestions from this thread but still was unsuccessful to convert geographic coordinate to projected coordinate systems.

                      Does someone have a formula (in Excel format) on how to convert "latitude - longitude" to "Easting -Northing"?

                      Cheers,


                      Agus,
                      perhaps you are looking at the Fields for lat and long in your FC.  They will not change running the project tool.  To display UTM coordinates add 2 more fields and use the "calculate geometry" tool in the attribute table.  Right-click on the new heading and select "Calculate Geometry", specify x for Easting or y for northing and the coordinates will be displayed.

                      Hardolph
                      • Re: Geographic to Grid coordinate
                        rimutaka
                        Thanks Hardolph.

                        I will give a try
                        • Re: Geographic to Grid coordinate
                          rimutaka
                          Hi Hardolph,

                          The steps I have done:

                          1. Added two new fields, namely Easting amd Northing.

                          2. Right click a header and click "Calculate Geometry"

                          3. Under Calculate Geometry's window:
                             a. Chose property in regard with field's name
                             b. the default unit is "Decimal degree"

                          4. When I cliked OK, the coordinates still showed in "Lat-Long" (degrees) instead of "Easting - Northing" (Metres/kilometres).

                          Any other suggestions?
                          • Re: Geographic to Grid coordinate
                            Hardolph
                            Hi Hardolph,

                            The steps I have done:

                            1. Added two new fields, namely Easting amd Northing.

                            2. Right click a header and click "Calculate Geometry"

                            3. Under Calculate Geometry's window:
                               a. Chose property in regard with field's name
                               b. the default unit is "Decimal degree"

                            4. When I cliked OK, the coordinates still showed in "Lat-Long" (degrees) instead of "Easting - Northing" (Metres/kilometres).

                            Any other suggestions?


                            Are you looking at the projected data? the Calculate Geometry tool just shows up underlying coordinates of the layer. it is not a projection tool.
                            If no other options than decimal degrees are available then check your data frame coordinate system; it will likely be in geographic.

                            Hardolph