Available with 3D Analyst license.
The Add Terrain Pyramid Level tool adds new pyramid levels to an existing terrain dataset.
The Pyramid Level Definition window defines the z-tolerance or window size and reference scale of one or more pyramid levels to be added to the terrain dataset.
The z-tolerance or window size can be specified as a floating-point value. The reference scale must be provided as a whole number (for example, a value of 24,000 represents a scale of 1:24,000).
The values are given in space-delimited pairs: one pair for each pyramid level. A pyramid level of 2.5 and a scale threshold of 1:10,000 would be entered into the definition window as: 2.5 10,000.
The example in the table below demonstrates setting terrain pyramid levels for a z-tolerance pyramid type.
Terrain Pyramid Definition
| Pyramid Level | Z - Tolerance | Reference Scale | Definition Window Entry |
|---|---|---|---|
1 | 0 | 1:1000 | 0 1000 |
2 | 1 | 1:5000 | 1 5000 |
3 | 2.5 | 1:10000 | 2.5 10000 |
4 | 5.0 | 1:25000 | 5 25000 |
5 | 10.0 | 1:50000 | 10 50000 |
Using the settings above, the full-resolution data is used in map displays up to a scale of 1:1,000. Between display scales of 1:1,000 and 1:5,000, only the data necessary to achieve an approximate vertical tolerance of 1.0, relative to the full-resolution data, is used. Between 1:5,000 and 1:10,000, only the data necessary to achieve an approximate vertical tolerance of 2.5, relative to the full-resolution data, is used. Between 1:10,000 and 1:25,000, a tolerance of 5 is used. For any scale smaller, a tolerance of 10 is used to display the terrain data.
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