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| surfacefeatures [2019/05/01 21:17] – created tarquinwj | surfacefeatures [2019/05/01 21:25] – PDF files get foreground colours with walls tarquinwj |
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| Include these surface features in your surface survey legs, so that you can precisely pinpoint their location. (Alternatively, you can trace over a satellite image in XTherion, as long as you can fix at least one position on your survey relative to that image. Note, however, that surface surveys are often a lot more accurate than satellite images, as the satellite image gets warped by the angle the image is taken from, and the shape of the landscape. Even relatively accurate approaches for stretching images back over their landscape fail quite significantly to match the actual landscape, particularly if trees are involved, as they cause most popular LIDAR scans to get the wrong altitudes. But I digress...) | Include these surface features in your surface survey legs, so that you can precisely pinpoint their location. (Alternatively, you can trace over a satellite image in XTherion, as long as you can fix at least one position on your survey relative to that image. Note, however, that surface surveys are often a lot more accurate than satellite images, as the satellite image gets warped by the angle the image is taken from, and the shape of the landscape. Even relatively accurate approaches for stretching images back over their landscape fail quite significantly to match the actual landscape, particularly if trees are involved, as they cause most popular LIDAR scans to get the wrong altitudes. But I digress...) |
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| Open the data rendered as an image (eg. a Therion XVI file) in XTherion's map editor, exactly like you would with a cave passage. Create scraps using the survey stations, exactly like you would with a cave passage. Draw on the features you wish to show (a circular "slope" makes a great doline, pitch lines are good for cliffs, and a "border" can be used to outline roads, paths and buildings - a "temporary" border subtype even gets rendered as a dashed line like a path may appear on a regular outdoor map - and fill areas if desired to show rivers, lakes or forests). Avoid using "wall" lines (unless you set their "outline" to "none"), because that will make Therion assume you are in a cave, which causes it to draw weird shapes on any .lox files. | Open the data rendered as an image (eg. a Therion XVI file) in XTherion's map editor, exactly like you would with a cave passage. Create scraps using the survey stations, exactly like you would with a cave passage. Draw on the features you wish to show (a circular "slope" makes a great doline, pitch lines are good for cliffs, and a "border" can be used to outline roads, paths and buildings - a "temporary" border subtype even gets rendered as a dashed line like a path may appear on a regular outdoor map - and fill areas if desired to show rivers, lakes or forests). Avoid using "wall" lines (unless you set their "outline" to "none"), because that will make Therion assume you are in a cave, which causes it to draw weird shapes on any .lox files, and add altitude highlights or foreground fills to your surface on any PDF files. |
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| But here comes the confusing part; when you ask Therion to include these scraps in your drawing, most of these features do not show up, because they are not inside a "cave" passage. | But here comes the confusing part; when you ask Therion to include these scraps in your drawing, most of these features do not show up, because they are not inside a "cave" passage. |