Projections

Introduction

EPSG codes uniquely define every projection available and are used by the WindFarmer scripting to avoid ambiguity. Find your EPSG codes here: http://spatialreference.org/ref/epsg/.

Another option for defining projection is the Global Mapper .prj file which contains "Well Known Text" that describes a projection.

Load a projection from a *.prj file

var projection = Toolbox.LoadProjectionFromFile(@"C:\TestData\BritishGrid.prj");

Create a projection from its EPSG code

var projection = Toolbox.GetProjectionFromEpsgCode(2805);

Set or redefine the global projection

var projection = Toolbox.GetProjectionFromEpsgCode(2805);

// Set or redefine the workbook's projection
Toolbox.RedefineWorkbookProjection(projection);

Reproject point

// WGS84 lat/long
var geoProjection = Toolbox.GetProjectionFromEpsgCode(4326);

// Reproject mast coordinates from current projection to lat-long	
Location geoMast = Toolbox.ReprojectPoint(
    Workbook.Climate.MeasurementSites["Mast 1"].Location,
    Workbook.Geography.Projection,
    geoProjection) as Location;