[Qgis-user] Mapping landslides

[Marco Hugentobler]

Hi Bob

>It would be nice if
> there was a way to create custom line styles by using a simple
> language like "1.5mm line 0.75mm gap"

It is possible to use custom line-gap linestyles using the current development 
version (or wait for 1.5). In the vector properties dialog, go to the 
symbology tab, click the 'new symbology' button. Then go to 'properties' and 
check the combo box 'use custom dash pattern'. Select cap style 'Flat' and 
klick 'change' to insert your custom pattern.

Regards,
Marco

Am Sonntag, 28. Februar 2010 08.21:07 schrieb Bob and Deb:
> Luckily the symbols I am interested in are point features.  I just
> have to learn more about how to use inkscape.  It would be nice if
> there was a way to create custom line styles by using a simple
> language like "1.5mm line 0.75mm gap"  -Bob
> 
> On Fri, Feb 26, 2010 at 5:04 PM, Alex Mandel <tech_dev at wildintellect.com> 
wrote:
> > Inkscape works fine for importing that pdf (And almost any pdf assuming
> > it not a rasterized pdf) At most you'll need to select and group several
> > pieces into a single object and save it.
> >
> > Most of these symbols are actually either very specific in size or are
> > line and fill types. Converting to SVG will only help with point
> > symbols. In the case of the symbols that are specific in size a png or
> > other non scalable graphic might be better to match the rules, SVG
> > should also work you'll just have always double check that you've got it
> > scaled correctly.
> >
> > I know we were working on allowing user created lines and fills but I'm
> > not sure how far we've come and know you'll need at least version 1.4 to
> > start accessing that ability.
> >
> > Thanks,
> > Alex
> >
> > On 02/26/2010 04:34 PM, Mike Toews wrote:
> >> Hi Bob,
> >>
> >> Sure is possible. First, you need to make the icon into an SVG file.
> >> If you have Adobe Illustrator, you can open the PDF you provided a
> >> link to, isolate or copy the graphic and save it as SVG. Inkscape is
> >> another good (free) tool, but it cannot open PDFs, so you will need to
> >> trace the graphic.
> >>
> >> Once it is an SVG, just place the file into the QGIS svg directory
> >> somewhere (e.g., C:\OSGeo4W\apps\qgis-unstable\svg), and it will be
> >> available as a point symbol next time you open QGIS. The symbol size
> >> can be based on a numeric attribute of the layer by setting Properties
> >>
> >>> Symbology > Drawing by field > Area scale (the location of this
> >>
> >> option depends on which version of QGIS, I'm using 1.4.0).
> >>
> >> -Mike
> >>
> >> On 26 February 2010 10:31, Bob and Deb <bobdebm at gmail.com> wrote:
> >>> Hello all,
> >>>
> >>> I am interested in mapping landslides using the symbols found here:
> >>> http://ngmdb.usgs.gov/fgdc_gds/geolsymstd/fgdc-geolsym-sec17.pdf .
> >>>
> >>> Can I do this with qgis?  If I can do this in qgis, I would also like
> >>> to have qgis scale some of these symbols so that they are proportional
> >>> to the size and direction of the landslide.  How do I do that?
> >>>
> >>> Thanks in advance!
> >>>
> >>> Bob
> 
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-- 
Dr. Marco Hugentobler
HUGIS - GIS programming and consulting
Webereistr. 66
CH-8134 Adliswil
marco at hugis.net
http://homepage.hispeed.ch/hugis/
Technical Advisor QGIS Project Steering Committee