Mt. Tam Technologies / Technology Consulting - Custom Web Development

Polylines, Trend Surfaces, Gridding and Contouring

This mapping application is offered for more sophisticated contour mapping needs.   It includes the ability to overlay polyline objects which are used to represent buildings, roads, fences or any landmarks.   More importantly, trend surface analysis is included in this package of applications.

The inspiration for these programs came from the book Statistics and Data Analysis in Geology by John C. Davis.   This book provides insight into the abilities and limitations of these programs.   The gridding algorithm is a distance weighted estimation.   As such, it will at times appear to place a contour on the wrong side of a data point.   This is fine for data of a statistical nature.   If precise contours are required to represent surfaces with abrupt slope changes (like ridges, streams or faults) perhaps your time is better spent using another application.

TERMS OF USE:  Mt. Tam Technologies makes no warranties for precision, accuracy or appropriateness of this application for your use.   You agree to use it "as is" and will not hold Mt. Tam Technologies liable for any damages.