[GRASS5] Re: [bug #3246] (grass) d.vect.thematic fails when the map is in another mapset

[Michael Barton]

1. This math interval difference only happens for the first interval
(min-value) for invterval mapping. This is to make sure that ALL values are
included and each value is included only once. If I specify [>lower value
and <= higher value] for each interval, I miss the minimum value of the
total range. If I specify [>=lower value and <=higher value] for each range,
some values get counted twice. So the actual range of values mapped is
correct, but the lower value shown in the legend is slightly below the
actual minimum. The "11.5948" instead of "11.60" is some kind of internal
rounding error that I have no idea how to correct.

2. I use the notation >lower value - higher value because of several
requests by users to do so. This makes it clearer that the interval is
greater (i.e., not inclusive of) the minimum and less than or equal to
(i.e., inclusive of) the maximum.

Michael
______________________________
Michael Barton, Professor of Anthropology
School of Human Evolution and Social Change
Arizona State University
Tempe, AZ  85287-2402
USA

voice: 480-965-6262; fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton


> From: Maciek Sieczka via RT <grass-bugs at intevation.de>
> Reply-To: Maciek Sieczka via RT <grass-bugs at intevation.de>
> Date: Tue, 17 May 2005 17:59:21 +0200 (CEST)
> Cc: <grass5 at grass.itc.it>, <michael.barton at asu.edu>
> Subject: [bug #3246] (grass) d.vect.thematic fails when the map is in another
> mapset
> 
> sorry for this doubled post Michael - I forgot to CC the grass5 list the
> 
> previous time
> 
> 
> 
> Michael
> 
> 
> 
> Unfortunatelly the bug remains - it is impossible to use d.vect thematic on a
> 
> map which is not in the same mapset where the session was started. There is
> 
> always " Table '(...)' doesn't exist." information. Could you please try to
> 
> fix it?
> 
> 
> 
> The GRASSRGB switch works like a charm. Thanks!
> 
> 
> 
> But there is incostistency in the legend provided by d.vect.thematic -l:
> 
> 
> 
> Value range:  57.920000 -  69.400000
> 
> Mapped by 1 intervals of 11.5948
> 
> 
> 
> Color(R:G:B) Value
> 
> ============ ==========
> 
> 250:0:0  >57.3408 - 69.5148
> 
> 
> 
> As you can see the calculated "Value range" is different than in the legend's
> 
> "Value" column. No matter what interval is used (here nint=1) there is always
> 
> a difference. Could it be fixed too?
> 
> 
> 
> Also I think that the ">" sign between the color and the the value in the
> 
> legend should be removed - it doesn't help in anything and worsens the clarity
> 
> of the information. How do you think?
> 
> 
> 
> Maciek
> 
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