Coordinate Calculator

Hydromagic has a built-in coordinate calculator tool, which can be used to convert a single projected (easting/northing) or geographic (latitude/longitude) coordinate. This tool can be used, for instance, to check whether configured map grids and map datums are working correctly. All map datums, grids, and ellipsoids configured in Hydromagic can be used with this conversion tool.

The following calculations are supported:

• Convert geographic coordinates to projected coordinates;
• Convert projected coordinates to geographic coordinates;
• Transform geographic coordinates between different map datums;
• Convert projected coordinates from one coordinate reference system to another;
• Convert geographic coordinates between different latitude and longitude formats.

Start the Coordinate Calculator

You can start the Coordinate Calculator by selecting "Coordinate Calculator..." from the "Tools" menu in the main window. After selecting this option, the following window appears:

Source Coordinates section

Source grid

In this field, the name of the source map grid is displayed. If the source coordinate is in geographic coordinates, the text: "Geographic Longitude / Latitude" is displayed here. To set the source coordinates to geographic coordinates, you have to select a map datum instead of a map grid.

Source datum

In this field, the name of the source datum is displayed. When a map grid is selected, this field displays the map datum used in this map grid. To set the source coordinates to geographic coordinates, select a map datum instead of a map grid.

Source coordinates (X)

Depending on whether you selected a map grid or not, this field is used to enter the source easting (X) or longitude coordinate. When using a map grid, the units of the X-axis are displayed ( for instance: meters, feet, links, etc... ). When using geographic coordinates, three radio buttons are shown. You can use these buttons to select the geographic format:

Source coordinates (Y)

Depending on whether you selected a map grid or not, this field is used to enter the source northing (Y) or latitude coordinate. When using a map grid, the units of the Y-axis are displayed ( for instance: meters, feet, links etc... ). When using a map datum, geographic coordinates are displayed as specified with the radio buttons.

Map button

When you click the 'Map...' button, the software will convert the source coordinates entered to a WGS84 geographic coordinates, and displays this position as a marker on a Google Maps webpage. This way you can check whether the correct coordinates have been entered.

Source geographic format

When using geographic coordinates, 3 radio buttons are shown, you can use these buttons to select the geographic format:

• Decimal Degrees;
• Degrees, Decimal Minutes;
• Degrees, Minutes, Seconds.

When a map grid is selected, these buttons are hidden, and the coordinates are always displayed in northing and easting (projected) units.

Destination Coordinates section

Destination grid

In this field, the name of the destination map grid is displayed. When the destination coordinate is in geographic coordinates, the text: "Geographic Longitude / Latitude" is displayed here. To set the destination coordinate to geographic coordinates, select a map datum instead of a map grid.

Destination datum

In this field, the name of the destination geodetic datum is displayed. When a map grid is selected, this field displays the map datum used in this map grid. To set the destination coordinate to projected coordinates, you have to select a map grid instead of a map datum.

Destination coordinates (X)

Depending on whether you selected a map grid, this field is used to display the calculated projected coordinates. When using a map grid, the units of the X-axis are displayed ( for instance: meters, feet, links etc... ). When using a map datum, geographic coordinates are displayed as specified with the radio buttons.

Destination coordinates (Y)

Depending on whether you selected a map grid or not, this field is used to display the calculated projected coordinates. When using a map grid, the units of the Y-axis are displayed ( for instance: meters, feet, links etc... ). When using a map datum, geographic coordinates are displayed as specified with the radio buttons.

Map button

When you click the 'Map...' button, the software will convert the destination coordinates to WGS84 geographic coordinates, and displays this position as a marker on a Google Maps webpage. This way you can check whether the correct coordinates have been entered or calculated.

Destination geographic format

When using geographic coordinates, three radio buttons are shown. You can use these buttons to select the geographic format:

• Decimal Degrees;
• Degrees, Decimal Minutes;
• Degrees, Minutes, Seconds.

When a map grid is selected, these buttons are hidden, and the coordinates are displayed in northing and easting (projected) units.

Buttons

Transform

Using the 'Transform' button, you can perform the actual map grid or map datum conversion. The source coordinates are always used as input, and the calculated result is displayed in the destination coordinates section.

Swap

When clicking the 'Swap' button, all values in the source and destination coordinates sections are swapped. This allows you to perform a reverse calculation without the need to re-enter all information.

Clear

By clicking the 'Clear' button, all fields and settings are reset to their default values.

Close

Close - Closes the window after saving the current settings and values.