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| extend [2019/12/02 09:29] – Line spacing tarquinwj | extend [2019/12/04 09:37] – Fixing tip links tarquinwj |
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| * They must be followed either by a valid survey **<station>** id, or a valid survey **<leg>** (pair of stations).\\ | * They must be followed either by a valid survey **<station>** id, or a valid survey **<leg>** (pair of stations).\\ |
| * Generally specifying a **<leg>** applies the option to ONLY that leg, and specifying a **<station>** applies the option to all subsequent **<legs>** within the centreline. But there is an exception with hide, and perhaps ignore, so read the notes below carefully.\\ | * Generally specifying a **<leg>** applies the option to ONLY that leg, and specifying a **<station>** applies the option to all subsequent **<legs>** within the centreline. But there is an exception with hide, and perhaps ignore, so read the notes below carefully.\\ |
| * You can include multiple caves in the same extended elevation, or [[extend#how_to_export_correct_extended_elevation_from_zig-zag_centerline|straighten out zig-zag surveys]], by way of ''data nosurvey'' legs. | * You can include multiple caves in the same extended elevation, or [[tips#how_to_export_correct_extended_elevation_from_zig-zag_centerline|straighten out zig-zag surveys]], by way of ''data nosurvey'' legs. |
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| ''extend start <leg>'' - start generating extended elevation centreline with this leg. (In one case i have found, it can have unexpected effects, even far from the starting leg. I think i prefer 'extend start station' as below.)\\ | ''extend start <leg>'' - start generating extended elevation centreline with this leg. (In one case i have found, it can have unexpected effects, even far from the starting leg. I think i prefer 'extend start station' as below.)\\ |
| * Often specifying one <leg> then in the next line specifying a <station> will stimulate the desired autogeneration. | * Often specifying one <leg> then in the next line specifying a <station> will stimulate the desired autogeneration. |
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| * Don't miss Martin Sluka's [[extend#how_to_export_correct_extended_elevation_from_zig-zag_centerline|hot tip for obtaining realistic extended centrelines]] from zig-zagged survey data (uses ''data nosurvey'') | * Don't miss Martin Sluka's [[tips#how_to_export_correct_extended_elevation_from_zig-zag_centerline|hot tip for obtaining realistic extended centrelines]] from zig-zagged survey data (uses ''data nosurvey'') |
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| * Caves, or parts of caves that comprise a linear passage with one or two dead-end branches are easiest to generate extended centrelines for. | * Caves, or parts of caves that comprise a linear passage with one or two dead-end branches are easiest to generate extended centrelines for. |