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Geo Essentials

A leading geodetic tool combining the EPSG geodetic parameter registry and classical geodetic calculator in one seamless package.  


Geo Suite Essentials is an intuitive desktop application used by field surveyors and Geomatics engineers to access geodetic parameters from a recognized geodetic authority and perform a range of comprehensive geodetic computations using the parameters provided from the geodetic authority.


Geo Suite Essentials comprises two integrated modules, namely:  Geo Suite Catalogue and Geo Suite Calc.  

Geo Suite Catalogue provides a graphical user interface and search engine to the underlying EPSG geodetic registry as its supporting authority.  

Geo Suite Calc is a simple but classical geodetic calculator enabling the user to perform a range of coordinate operations between single points (source and target) in addition to files containing multiple points.


  • A simple classical geodetic calculator designed to provide:
  • Coordinate operations of type:  
    Conversion and transformation between two user-selected coordinate reference system
  • Perform distance and azimuth computations between pairs of points (known as forward and reverse computations)
  • Provide file conversions with user defined file format specifications
  • Full compliance with EPSG database and ISO terminology


  • Simple user interface
  • Direct link to Geo Suite Catalogue (EPSG geodetic parameter registry) for geodetic parameter definition
  • User-defined file format function 
  • Inventory of pre-defined file formats, e.g. UKOOA P1, SEG-P1, SPS etc.
  • Coordinate Operations of type:  Conversion and Transformation algorithms comply to EPSG guidance notes 373-07-2
  • Reverse and forward computations
  • Single point-to-point and file to file coordinate operations 
  • Fully GIGS tested.

Prior to performing computations parameters for both Point A (source) and Point B (target) coordinate reference systems are selected.  This can be done in one of two ways:

1. From within Geo Suite Catalogue if user is viewing CRS definitions within Geo Suite Catalogue then Geo Suite Calc can be spawned directly and populated with the CRS parameters being viewed automatically.

2.  Source and Target CRS can be selected from the 'CRS definition wizard' provided within Geo Suite Calc.  Details of this are shown thus:

The wizard provides a set of filters to list only the CRS' that fit that criteria from Geo Suite Catalogue. Filters are based on geographical area and coordinate reference system type (Geocentric, 2D Geographic, 3D Geographic and Projected).


Vertical datums are also recognized to enable gravity-related vertical components to be selected to create compound CRS definitions.


Once Source and Target CRS' have been selected the main panel of Calcr will display the selections along with the basic parameters associated with each CRS.  It can now perform computations between these CRS's.

The default computation is that of a single point coordinate operation whereby the coordinates of a point are entered into either Point A or Point B and the coordinate operation (either conversion or transformation) is performed between the two by clicking on the required arrow button in the middle column.


A file containing multiple points (of the same format and CRS definition) can also be operated upon between the source and target CRS's selected.  An 'import wizard' is provided so user can provide the format of the input file and thus does not restrict the user from pre-conditoning the file prior to use.   The wizard guides the user through a series of steps required to define the location of the coordinates contained within the file (e.g. row and column definition).  An inventory of common exchange file formats are also recognized in addition to well known text and .prj files.Q

The converted data is exported to a user selected file.  The coordinates can be either appended to the original import file or written to a new file.  Details of the coordinates being exported are displayed within the main panel of the 'Process File' user panel.


The reverse and forward computation modes enable computations to be performed to compute distance, angular and coordinates between pairs of positions.   The relationship is shown below and comprises seven parameters, namely:  Two angular (forward bearing and reverse bearing), four positional (two coordinates for point A and two coordinates for point B) and one distance (s - geodetic or plane distance between point A and point B).


The reverse computation enables the distance and bearings (forward and reverse) to be computed between pairs of points when the coordinates of the two points is provided.   The coordinates of point A and point B will be submitted to the boxes provided and Geo Suite Calculator will determine the three unknown parameters. The answers are displayed in the box provided.

Computations can be performed on either an ellipsoidal surface or a plane surface depending of whether geographic or projected coordinates are used.  It is recommended that the computations are performed on the ellipsoidal surface to preserve accuracy.


The forward computation enables the coordinates of point B to be computed when the coordinates of point A are known along with the distance and bearing to point B.  The reverse bearing from point B back to point A is also determined as part of the computation.

The coordinates of point A are entered into the fields provided.  The Forward button is selected and a secondary panel will appear requiring entry of the distance and bearing to point B.  Once provided the coordinates of point B along with the reverse bearing will be determined.


Is a standalone application providing a graphical front end user interface to the back-end geodetic parameter database, provided by EPSG Database (current version 8.8) including any user-defined parameters.   The module provides a rapid graphical and manual search engine that enables geodetic parameters contained within the database to be accessed within a few mouse clicks for a required geographic area.

The tool provides a fast and effective method for viewing geodetic parameters associated with a selected area or region.  All classifications of geodetic parameters can be accessed according to their grouping within EPSG hierachy. 


  • A graphical user interface providing a simple geographical display for data searches
  • Manual search engine enabling specific queries to be made based up EPSG codes or text strings (e.g. CRS name or Country).
  • Display search results for each different geodetic category, e.g. Ellipsoids, Units of Measure and Prime Meridians to Coordinate Reference Systems (Projected and Geographical CRS) and Coordinate Transformations.
  • Data mining enabling parameters of a CRS to be viewed at different levels of detail.
  • Enables the creation of User-Defined geodetic parameters for all of the geodetic categories listed within EPSG geodetic parameter registry.
  • Creation of reports of the CRS parameters for easy visualization and exchange.
  • Link to OGP published Access Database.
  • Deprecated items can be hidden or viewed upon request.
  • Allows all global CRS’ to be hidden or viewed upon request, i.e. ITRF systems etc.
  • Provides automated direct piping,  to Geo Suite Calc, of source and target CRS parameters from the geodetic database.
  • Provides analytical tools to determine to which CRS coordinates belong when no knowledge of the CRS has been provided.


Graphical user interface displays world map upon which a country or specific point can be selected by user to query the database as to what geodetic parameters are listed for that location.  Basic tools are provided to help zoom into or out of a geographic area to help identification.


Geo Suite Catalogue provides a manual search function where a string value can be entered into the text box provided.  The text string can comprise either a geographical description of the area of interest or an EPSG code should it be already known.


The results panel lists all geodetic parameters (by category) that fit the search criteria defined.  The results panel can be changed to view parameters by category or arranged to be listed according to any of the items shown (i.e. name, code etc.)


From the results panel additional details of any of the items shown can be found by selecting that item from the results list.

The process can be continued through different layers as are available for the parameters provided.

Parameter Piping

In addition to providing a quick view facility for the geodetic parameter registry, Geo Suite Catalogue's main function is to pipe geodetic parameters to all other modules of Geo Suite Tool Kit thus providing geodetic integrity and consistency of computations throughout Geo Suite Tool Kit. This is replicated within Geo Essentials where the paramters are piped directly to the the geodetic calculator.

The parameters for any CRS being viewed within Geo Suite Catalogue can be piped directly to Geo Suite Calc to populate the Source and Target CRS of the calculator directly.  For example, the CRS being viewed in Geo Suite Catalogue is WGS 84 / UTM zone 49N.

If the Calculator button is selected from this panel is will take the geodetic parameter values from Geo Suite Catalogue for the CRS being viewed and will populate the calculator directly.  In this instance:

Source CRS:   WGS 84 / UTM zone 49N
Target CRS:  WGS 84

This enables a coordinate operation of type:  Conversion to be performed between the 2D projected CRS and 2D geographic CRS.


Geo Suite Catalogue supports backward compatibility between different vintages of EPSG databases. This protects any user-defined CRS ‘ and or other parameters that have been added to an existing database.   When a later version of the EPSG database is downloaded all the previously entered user-defined geodetic parameters will be automatically copied from the existing geodetic database to the new geodetic database.  All EPSG codes will be honoured during the process, particularly those user-defined codes assigned.


Analysts regularly face the situation where coordinates of a point are provided but it is not supported by sufficient metadata to describe to which CRS the coordinates are referenced.  Two tools are provided by Geo Suite Catalogue to assist determining to which CRS the coordinates may belong.  One tool will perform the search based upon coordinate conversions and one with respect to coordinate transformations.

The result will appear as follows in the case of coordinate conversion:

Geo Suite Catalogue

Geodetic parameter registry providing a database of parameters using EPSG geodetic registry and its supporting authority.

Geo Suite Calculator

Classical geodetic calculator enabling the user to perform range of coordinate operations between single points (source and target) and multiple points.

Fix the following errors: