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Overview
When there When there is an extra facet adjacent to the girdle, GIA and Octonus use different methods there are OLD and New methods to handle them, which defines that define different shapes of the corresponding girdle curve. Later, the points related to the calculation of the stone heights will be searched on this curve. As the different versions of the program use different methods, it is important to understand difference between them.
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Currently, the GIA method is used in the system. Octonus values for Girdle bezel , Girdle bone, and Girdle valley are also calculated for testing purposes, but available only via Export Report Data function. |
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| Girdle Heights Calculation Methods | |
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OLD Method | NEW method |
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| Girdle heights calculation method | |
GIA method | Octonus method |
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Notes
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See examples and further explanations on the Building Virtual Model page. |
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For these parameters, the normal bookmark set is extended with the same bookmarks with _GIA and (OLD method) and _OCT in (NEW method) in their names.
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This functionality is currently available only under the following HASP keys:
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Therefore, values of default bookmarks are equal to _GIA, that is, for example, GIRDLE_WIDE_BEZEL_MAX = GIRDLE_WIDE_BEZEL_MAX_GIA
Examples
Girdle Bezel Difference Example
Here is an example of how Girdle Bezel is calculated differently using GIA and Octonus methods.
| Project File with models for this sample |
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See details on how points are found in the "Finding Points" section of the Stone Heights Calculation page.
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| OCT,% | GIA,% | OCT,mm | GIA,mm | ||
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| GIRDLE_WIDE_BEZEL | 1 | 2.87 | 2.87 | 0.137 | 0.137 |
| 2 | 2.5 | 2.22 | 0.119 | 0.106 | |
| 3 | 3.35 | 3.35 | 0.16 | 0.16 | |
| 4 | 3.21 | 3.21 | 0.153 | 0.153 | |
| 5 | 2.66 | 2.66 | 0.127 | 0.127 | |
| 6 | 2.58 | 2.58 | 0.123 | 0.123 | |
| 7 | 2.64 | 2.64 | 0.126 | 0.126 | |
| 8 | 2.99 | 2.99 | 0.143 | 0.143 | |
| MIN | 2.5 | 2.22 | 0.119 | 0.106 | |
| MAX | 3.35 | 3.35 | 0.16 | 0.16 | |
| AVG | 2.85 | 2.81 | 0.136 | 0.134 | |
| DEV | 0.85 | 1.13 | 0.041 | 0.054 |
Girdle Bone Difference Example
Here is an example of how Girdle Bone is calculated differently using GIA and Octonus methods.
| Project File with models for this sample |
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See details on how points are found in the "Finding Points" section of the Stone Heights Calculation page.
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| OCT,% | GIA,% | OCT,mm | GIA,mm | ||
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| GIRDLE_WIDE_BONE | 1 | 3.27 | 3.27 | 0.156 | 0.156 |
| 2 | 3.57 | 3.57 | 0.17 | 0.17 | |
| 3 | 3.68 | 3.68 | 0.176 | 0.176 | |
| 4 | 3.28 | 3.28 | 0.157 | 0.157 | |
| 5 | 3.84 | 3.84 | 0.183 | 0.183 | |
| 6 | 3.19 | 2.7 | 0.153 | 0.129 | |
| 7 | 3.54 | 3.54 | 0.169 | 0.169 | |
| 8 | 3.29 | 3.29 | 0.157 | 0.157 | |
| MIN | 3.19 | 2.7 | 0.153 | 0.129 | |
| MAX | 3.84 | 3.84 | 0.183 | 0.183 | |
| AVG | 3.46 | 3.4 | 0.165 | 0.162 | |
| DEV | 0.65 | 1.13 | 0.031 | 0.054 |
Girdle Valley Difference Example
Here is an example of how Girdle Valley is calculated differently using GIA and Octonus methods.
| Project File with models for this sample |
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See details on how points are found in the "Finding Points" section of the Stone Heights Calculation page.
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| OCT,% | GIA,% | OCT,mm | GIA,mm | ||
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| GIRDLE_NARROW | 1 | 3.66 | 3.66 | 0.169 | 0.169 |
| 2 | 3.72 | 3.72 | 0.172 | 0.172 | |
| 3 | 4.04 | 3.88 | 0.187 | 0.18 | |
| 4 | 3.92 | 4.6 | 0.181 | 0.213 | |
| 5 | 4.01 | 4.01 | 0.186 | 0.186 | |
| 6 | 3.94 | 3.94 | 0.182 | 0.182 | |
| 7 | 2.91 | 2.91 | 0.135 | 0.135 | |
| 8 | 2.5 | 2.5 | 0.115 | 0.115 | |
| 9 | 2.68 | 2.68 | 0.124 | 0.124 | |
| 10 | 2.28 | 2.28 | 0.105 | 0.105 | |
| 11 | 2.17 | 2.17 | 0.1 | 0.1 | |
| 12 | 3.09 | 3.09 | 0.143 | 0.143 | |
| 13 | 3.57 | 3.57 | 0.165 | 0.165 | |
| 14 | 3.45 | 3.45 | 0.159 | 0.159 | |
| 15 | 2.94 | 2.54 | 0.136 | 0.118 | |
| 16 | 3.23 | 2.09 | 0.15 | 0.097 | |
| MIN | 2.17 | 2.09 | 0.1 | 0.097 | |
| MAX | 4.04 | 4.6 | 0.187 | 0.213 | |
| AVG | 3.26 | 3.19 | 0.151 | 0.148 | |
| DEV | 1.87 | 2.51 | 0.087 | 0.116 |
Related Pages
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