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| tips [2020/10/22 14:23] – Moving new section tarquinwj | tips [2024/11/17 06:08] (current) – [Choosing Colour Palettes] Add https://colorcodes.io brucemutton | ||
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| ==== Avoiding Invisible or Misshapen Scraps in Loch and Google Earth ==== | ==== Avoiding Invisible or Misshapen Scraps in Loch and Google Earth ==== | ||
| - | Over time the pdf outputs have become resilient to many drawing misdemeanour' | + | Over time the pdf outputs have become resilient to many drawing misdemeanour' |
| Here are the usual culprits. | Here are the usual culprits. | ||
| ^ Misdemeanour ^ Symptom ^ | ^ Misdemeanour ^ Symptom ^ | ||
| |* //line wall// with incorrect ' | |* //line wall// with incorrect ' | ||
| - | |* //line wall// | + | |* //line wall// |
| + | |* //line wall// that is completely enclosed by a single scrap (such as for an oxbow passage) but is not continuous and closed. | ||
| |* An open passage end has one or more wall ends that curls back into the interior of the passage. | Invisible passage | | |* An open passage end has one or more wall ends that curls back into the interior of the passage. | Invisible passage | | ||
| |* A scrap has open space along it's length. ie openings left for side passages directly opposite each other break the scrap in half. | Only one of the parts of the scrap are rendered | | |* A scrap has open space along it's length. ie openings left for side passages directly opposite each other break the scrap in half. | Only one of the parts of the scrap are rendered | | ||
| - | |* Scrap is wider than it is long, or has long walls with ' | + | |* Scrap is wider than it is long, or has long walls with '' |
| |* Passage wall has a loop in it, either because the bezier curve handles have been extended too far, or because the subsequent morphing when scraps join has encouraged a loop to form|probably invisible passage (not verified) Metapost gives a 'scrap outline intersects itself' | |* Passage wall has a loop in it, either because the bezier curve handles have been extended too far, or because the subsequent morphing when scraps join has encouraged a loop to form|probably invisible passage (not verified) Metapost gives a 'scrap outline intersects itself' | ||
| - | |* Therion cannot handle two consecutive | + | |* Therion cannot handle two consecutive |
| - | |* A line with //-outline out// is connected to a line with //-outline in// |Passages have gaps and strange artefacts emanating from them| | + | |* A line with '' |
| |* Instead of abutting end to end, a pair of line wall overlap each other, the first segment of one line with the last segment of another | Loch model contains large spurious artefacts | | |* Instead of abutting end to end, a pair of line wall overlap each other, the first segment of one line with the last segment of another | Loch model contains large spurious artefacts | | ||
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| If you draw two or more scraps adjacent to each other in your drawing *.th2 file, and make sure the adjacent line wall ends snap to each other, then Therion will automatically morph them, if necessary, to create a perfect join. A morph might be necessary, if for example survey closure or other drawing distortions might tend to separate the scraps you have drawn as touching.\\ | If you draw two or more scraps adjacent to each other in your drawing *.th2 file, and make sure the adjacent line wall ends snap to each other, then Therion will automatically morph them, if necessary, to create a perfect join. A morph might be necessary, if for example survey closure or other drawing distortions might tend to separate the scraps you have drawn as touching.\\ | ||
| - | This is really just an automatic implementation of the ' | + | This is really just an automatic implementation of the ' |
| + | |||
| + | In fact, any points or line points (not just open ends of passage walls) drawn coincident (snapped together) in a th2 file will be morphed in the output to also be coincident. | ||
| **Semi-automatic scrap by scrap** | **Semi-automatic scrap by scrap** | ||
| - | join scrap1 scrap2 [-count <number of passage (not line) joins for Therion to look for>] | + | join scrap1 scrap2 [-count <number>] of passage (not line) joins for Therion to look for |
| + | where <number> must be greater than or equal to 2 | ||
| The method can only join two scraps at a time. Note that it only works using passages defined by lines of " | The method can only join two scraps at a time. Note that it only works using passages defined by lines of " | ||
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| join line1:john line2:jane line3:jack line4:jill | join line1:john line2:jane line3:jack line4:jill | ||
| + | |||
| + | If you refer to the same point in more than one join statement, then one of the joins will be ignored. | ||
| For more detail see [[tbe: | For more detail see [[tbe: | ||
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| //**Take care that the final colour will strictly depend on setup (calibration) of your screen, system, application and printer or data projector!!!**// | //**Take care that the final colour will strictly depend on setup (calibration) of your screen, system, application and printer or data projector!!!**// | ||
| + | Also check out https:// | ||
| =====Reconstruction of surveying data from paper map===== | =====Reconstruction of surveying data from paper map===== | ||