Interpolated Surfaces

freefall64

I want to use Inverse Distance Weighting to create a surface from a set of points (imported from a spreadsheet). ArcGIS Spatial Analyst has further options such as Natural Neighbour or Spline but IDW works just fine for my work. Any ideas?

global_mapper

I would suggest using the density grid generation option for a point layer by right-clicking on it in the Control Center and selecting the option to create a density grid based on some attribute value (or just the count of points).

Let me know if I can be of further assistance.

Thanks,

Mike

DJ12

Good night
Can you tell me what is the interpolation method used by Global Mapper when the resample manual is done (e.g. selecting 25m pixel output to an original 50m grid)?

Thanks,

DJ12

global_mapper

If you are over-sampling a gridded surface whatever resampling method that you have set for the grid layer on the Options dialog for that layer will be used. By default for grid layers this is bilinear interpolation, but other available options that make sense for this situation are bicubic (slightly better but slower than bilinear) or nearest neighbor (i.e. no resampling).

Let me know if I can be of further assistance.

Thanks,

Mike
Global Mapper Guru
gmsupport@bluemarblegeo.com
http://www.globalmapper.com