On 30/09/2012 23:41, phil rosenberg wrote:
> Hi Alan
> I was just considering that one negative brought up regarding supporting
> shapefiles was the addition of extra dependencies. I sometimes feel
> (probably wrongly) that if only a basic bit of functionality is needed
> then it's easier to have a basic bit of code that does exactly what I
> (we) need rather than add an extra dependency and API (and possibly
> build system) that goes overboard on features. Maybe this is a Windows
> hangup as a lot of open source code has build systems which are rather
> biased towards linux (even CMAKE setups can be guilty of this) so
> sometimes it can be a few days work to get a library built and more than
> once I've been totally unable to do it. This kind of thing is often
> quite daunting to people who haven't done it before.
>
> I'll have a look at shapelib anyway and see if compiles easily on Windows.
>
> Phil
Hello to everybody,
please note that shapelib is part of the OSGEO4W installation,
https://trac.osgeo.org/osgeo4w/
which is currently the official and supported way to install shapelib
(and to build it) on Windows; OSGEO4W comes with an interactive
installer which allows you to choose the desired packages, from lower
level libraries to full GIS applications, and the necessary dependencies
are automatically installed. And of course it includes also Gdal/Ogr, as
a more general approach to GIS formats.
FYI. another useful site with high resolution, free (with limitations)
country boundaries data in shapefile format is this one:
http://www.gadm.org/
Best regards, Davide
>
>
> ------------------------------------------------------------------------
> *From:* Alan W. Irwin <ir...@beluga.phys.uvic.ca>
> *To:* phil rosenberg <philip_rosenb...@yahoo.com>
> *Cc:* "plplot-devel@lists.sourceforge.net"
> <plplot-devel@lists.sourceforge.net>
> *Sent:* Sunday, 30 September 2012, 0:52
> *Subject:* Re: [Plplot-devel] map resolution
>
>
>
> But do you really want to re-implement a shapefile parser? The MIT or
> LGPL dual-licensed shapelib library (see
> http://shapelib.maptools.org/) does that already and provides an API
> to read shapefile data from shapefile files.
>
> Just out of curiosity about the build system and the platforms that
> shapelib could be built on, I downloaded that library from
> http://download.osgeo.org/shapelib/shapelib-1.3.0.tar.gz (released in
> April this year so it appears shapelib is still under active
> development). The README in the top-level directory basically says
> that the build is done with make on Linux and nmake on Windows with
> very few files involved in the build. So that already looks like you
> will be able to build it on your Windows platform, but as a matter of
> convenience (and also something valuable you could donate back to the
> shapelib project) it would probably be worth your while to update that
> build system to CMake so that the code can be built out of the box for
> virtually every Windows platform and Unix platform.
>
> The debian packages for the shapelib package (containing shapelib
> applications) and libshp1 package (containing the shapelib library)
> shows no external dependencies other than the C library. So that
> should make for an extremely simple build (as already implied by the
> above README) which should be easy to generalize with CMake.
>
> Alan
> __________________________
> Alan W. Irwin
>
> Astronomical research affiliation with Department of Physics and Astronomy,
> University of Victoria (astrowww.phys.uvic.ca).
>
> Programming affiliations with the FreeEOS equation-of-state
> implementation for stellar interiors (freeeos.sf.net); the Time
> Ephemerides project (timeephem.sf.net); PLplot scientific plotting
> software package (plplot.sf.net); the libLASi project
> (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
> and the Linux Brochure Project (lbproject.sf.net).
> __________________________
>
> Linux-powered Science
> __________________________
>
>
>
>
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--
============================= Davide Cesari ============================
Servizio IdroMeteoClima - ARPA Emilia Romagna
NWP modelling - Modellistica numerica previsionale
Phone/Fax: +39 051525926/+39 0516497501
E-mail: dces...@arpa.emr.it
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Address: ARPA-SIM, Viale Silvani 6, 40122 Bologna, Italy
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