Creating grids using other methods, Grid import formats – Pitney Bowes MapInfo Vertical Mapper User Manual
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Vertical Mapper 3.7
Creating Grids Using Other Methods
There are a number of ways you can create a grid other than by using the Interpolation or Modeling
Wizards.
Import grids from other formats You can import a grid from any supported format. For more
information on importing grids, see
Create Point Density Grids Using the Point Density command from the Vertical Mapper, Create
Grid menu, you can create a point density grid representing the density of events in an area. You
can choose Point Density using Square Area or Point Density using Kernel Smoothing. For
information about creating point density grids, see
Creating Point Density Grids on page 74
Convert a MapInfo region to a grid Using the Region to Grid command from the Vertical Mapper,
Create Grid menu, you can convert a MapInfo region to a grid. For information about converting
MapInfo regions, see
Region-to-Grid Conversion on page 78
Create a Buffer grid Using the Grid Buffer command from the Vertical Mapper, Create Grid menu,
you can create a buffer around a line, polyline, point, or polygon. For information about grid
buffering, see
Use the Poly-to-Point tool The Poly-to-Point tool does not create a grid, but it can be used to
prepare line data for grid creation by extracting points from existing tables of polylines or regions.
For information about the Poly-to-Point tool, see
Preparing Data using Poly-to-Point on page 82
.
Create grids by analyzing other grids Each of the tools used to analyze an existing grid creates a
new grid with the results of the analysis. For more information about analyzing grids, see
Grids for Spatial Analysis on page 118
Grid Import Formats
Due to the ever-increasing usage of binary and ASCII-based grid files in desktop mapping
environments, Vertical Mapper imports a number of formats for the more commonly used grid types.
Most of these grids represent the elevation of a land surface, commonly referred to as Digital Terrain
Models (DTMs) or Digital Elevation Models (DEMs).
The Grid Import utility can auto-detect and convert the following formats:
ASCII Grid is a simple text-based format consisting of five lines of header information followed by
rows of space-delimited float point values. Due to its simple and relatively compact nature, you
should consider writing your data in this format when you want to import your own grid data into
Vertical Mapper. When this file format is detected, a dialog box is displayed that enables you to set
•
ASCII Grid
•
ASCII Classified Grid
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CRC-500
•
Geological Survey of Canada
Grid
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DTED
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GeoSoft
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MONA
•
UK Ordnance Survey Grid
•
USGS DEM
•
SDTS - Spatial Data Transfer
Standard Grid
•
MIG Grid