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

[Maciek Sieczka]

From: "Michael Barton" <michael.barton at asu.edu>

> 1. This math interval difference only happens for the first interval
> (min-value) for invterval mapping.

Actually it also happens for the last interval too - max in the legend and
the actual max are never the same. Is it also by design?

> 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

Understood. But anyway if I use the d.vect.thematic -l output for
publication it may look supsicious for the eventual reader.  I'm not
complaining here - I rerally apprecaite your effort and just trying to be 
helpfull. This legend looks suspicious and if somebody could fix it would 
great.

And what about the bug remaining (as in the title)? Any chances it will be
fixed?

Maciek

> ______________________________
> 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
>>
>> -------------------------------------------- Managed by Request Tracker
>
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