TerrainMap 2.0 (for WinNT and Win95)


-- Purpose
    This software is designed for (terrain) surface modeling. It takes in
    spatial sampling data, contour data or grid data and generates 3D
    spatial models.

    Three spatial models are supported. They are 1) Triangulated 
    Irregular Networks (TINs); 2) Contour model; 3) Digital Elevation
    model (DEM) or grid model.

    Triangulation algorithm invented is linear, thus it is extremely fast.
    No software known to the author has faster triangulation than this
    one. Here are the benchmarks for TINs generation from random points.

    (PC environment: P5/120mh 16mb ram under WinNT 3.51)
	TIN generation of 10,000 triangles needs 1.442 seconds
	TIN generation of 20,000 triangles needs 3.165 seconds
	TIN generation of 40,000 triangles needs 6.479 seconds
	TIN generation of 80,000 triangles needs 14.491 seconds

    TIN generation is provided.

    Contour generation is provided.

    DEM generation is provided.

    3D display with hidden line removal is provided.

    Full model Conversions are implemented, including TINs to Contours,
    Contours to TINs, TINs to DEM, DEM to TINs, Contours to DEMs, DEMs to
    Contours. Each type of conversion is almost instant.

    Contour label positioning is automatic.

    Voronoi polygon generation is provided.

    Layered model display is provided. Layers include TINs, DEMs,
    Contours, Voronoi polygons, sample points, point label, contour label.

    Instant 3D surface roaming is enabled.
    
-- Installation
    Simple. Copy 'tmap.zip' onto your PC. Note that your PC must 
    run under Windows95, WindowsNT 3.51 or later versions.
    Use 'pkunzip' to unzip 'tmap.zip'. 'tmap.zip' contains
    five files, 'readme.txt', 

-- Is it a shareware ?
    This version is a shareware version. If you download it from the Simtel,
    then it is FREE. If you want the author to send the software via U.S.
    mail. For raw material cost and shipping and handling fee, $10.00 must
    be paid for U.S. users; $15.00 for international users.

-- Limitations on distribution
    This version can be distributed freely to anywhere.

-- How to contact
    If you like to express your appreciations or comments, please write to
	Yiping Song
	110 Corrina Blvd., #478
	Waukesha, WI 53186
	U.S.A.
	(ysong@mke6.ra.rockwell.com)

-- Copyright 1996 Yiping Song. All rights reserved.
