Geology: Difference between revisions
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m (→Strike-and-dip symbols: man page link) |
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* <tt>geology/strike_line,box,triangle,circle</tt>: | * <tt>geology/strike_line,box,triangle,circle</tt>: | ||
: [[Image:Symb-geo.png|350px]] | : [[Image:Symb-geo.png|350px]] | ||
* ps.map can take rotation angle from an attribute column for each site with the '''''vpoints''' rotatecolumn'' instruction; for d.graph you can prepare a command file with a custom rotation for each point using {{cmd|v.out.ascii}}, {{cmd|v.db.select}}, or the ''v.out.ascii.db'' addon script. Note that GRASS uses the Cartesian convention for rotation angles, i.e. CCW from east. Convert from compass angles with: | * {{cmd|ps.map}} can take rotation angle from an attribute column for each site with the '''''vpoints''' rotatecolumn'' instruction; for d.graph you can prepare a command file with a custom rotation for each point using {{cmd|v.out.ascii}}, {{cmd|v.db.select}}, or the ''v.out.ascii.db'' addon script. Note that GRASS uses the Cartesian convention for rotation angles, i.e. CCW from east. Convert from compass angles with: | ||
theta = 90 - degrees_true | theta = 90 - degrees_true | ||
: You could possibly write a small {{cmd|db.execute}} script to populate a new column with this conversion by way of a SQL query. (and post it here :) | : You could possibly write a small {{cmd|db.execute}} script to populate a new column with this conversion by way of a SQL query. (and post it here :) | ||
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* to make open symbols set the fill color to 'none'. | * to make open symbols set the fill color to 'none'. | ||
* to make a double sided dip symbol draw the same symbol twice with 180 rotation the second time. | * to make a double sided dip symbol draw the same symbol twice with 180 rotation the second time. | ||
=== Modules of interest === | === Modules of interest === | ||
Revision as of 01:11, 3 December 2008
Examples
- See the Cartography screenshots page
Strike-and-dip symbols
See the IconSymbols wiki page
- geology/strike_line,box,triangle,circle:
- ps.map can take rotation angle from an attribute column for each site with the vpoints rotatecolumn instruction; for d.graph you can prepare a command file with a custom rotation for each point using v.out.ascii, v.db.select, or the v.out.ascii.db addon script. Note that GRASS uses the Cartesian convention for rotation angles, i.e. CCW from east. Convert from compass angles with:
theta = 90 - degrees_true
- You could possibly write a small db.execute script to populate a new column with this conversion by way of a SQL query. (and post it here :)
- to make open symbols set the fill color to 'none'.
- to make a double sided dip symbol draw the same symbol twice with 180 rotation the second time.
Modules of interest
- ps.map for cartography
- ...
Links
- ...