/// <summary>
/// Initializes the grid by loading or creating cardinal direction points.
/// </summary>
private void Init()
{
var directionPoints = new Dictionary <DirectionEnum, IGeoLocation>();
// load existing cardinal direction points from DB
foreach (var directionPoint in Home.CardinalDirectionPoints.Where(x => x.UnitDistance == unitDistance))
{
directionPoints[directionPoint.Direction] = directionPoint;
}
// add any missing direction points
foreach (DirectionEnum direction in Enum.GetValues(typeof(DirectionEnum)))
{
if (directionPoints.ContainsKey(direction))
{
continue;
}
directionPoints[direction] = ComputeOffset(direction);
var newPoint = new CardinalDirectionPoint()
{
OriginId = Home.Id,
UnitDistance = unitDistance,
Direction = direction,
Latitude = directionPoints[direction].Latitude,
Longitude = directionPoints[direction].Longitude
};
dbContext.CardinalDirectionPoints.InsertOnSubmit(newPoint);
}
// save any possible new points
dbContext.SubmitChanges();
// set deltas
deltaLat = (directionPoints[DirectionEnum.North].Latitude - directionPoints[DirectionEnum.South].Latitude) / 2.0;
deltaLon = (directionPoints[DirectionEnum.East].Longitude - directionPoints[DirectionEnum.West].Longitude) / 2.0;
}
public double CalculateArea(ComputeAreaInputs rangeOptions)
{
var range = new RangeGrid(rangeOptions.OriginName, rangeOptions.RangeMins, rangeOptions.UnitDistance);
range.Process();
var border = range.GetBorder(rangeOptions.SmoothPct);
var area = GeometryApi.ComputeArea(border, apiKey);
using (var dbContext = new RangerDataContext())
{
var existingRegion = dbContext
.Regions
.SingleOrDefault(x => x.OriginId == range.Home.Id && x.RangeMins == rangeOptions.RangeMins && x.UnitDistance == rangeOptions.UnitDistance);
if (existingRegion == null)
{
var newRegion = new Region()
{
OriginId = range.Home.Id,
RangeMins = rangeOptions.RangeMins,
UnitDistance = rangeOptions.UnitDistance,
Area = area,
BorderNodes = border.Length
};
dbContext.Regions.InsertOnSubmit(newRegion);
}
else
{
existingRegion.Area = area;
existingRegion.BorderNodes = border.Length;
}
dbContext.SubmitChanges();
}
return(area);
}