[GRASS-dev] [release planning] 7.4.0

[Moritz Lennert]

Hi Maris,

Le Sun, 29 Oct 2017 12:31:35 +0200,
Maris Nartiss <maris.gis at gmail.com> a écrit :

> I added simple tests for v.profile. [1]
> I also changed one of examples from documentation to use NC Basic
> dataset. [2]
> 
> If v.profile is moved to trunk, README file should be deleted.
> 
> As there seem to be a lot of +1's and the requirement of tests is
> fulfilled, this addon should be moved to trunk to gain some exposure
> before release (or wait till 7.4.1).

v.profile still uses the old buffering library methods which has quite
a lot of issues.

As an example, I attach the output map of the following example:

v.profile input=geonames_NC at PERMANENT output=- separator=comma dp=3
buffer=500 profile_map=roadsmajor at PERMANENT profile_where=cat=193
map_output=test_profile

I also attach the equivalent v.buffer output:

v.buffer -c roadsmajor where=cat=193 dist=500 out=buff500

Would it be possible for you, Maris, to change to the GEOS method used
in v.buffer in order to get the same buffering output ?

This is not only formal as you can see when you use the following
vector points as input:

v.in.ascii in=- out=test_points << EOF
626382.68026139|228917.44816672|1
626643.91393428|228738.2879083|2
626907.14939778|228529.10079092|3
EOF

v.profile then misses out on point 2, even though it is within 500m:

v.profile input=test_points output=- separator=comma dp=3 buffer=500
profile_map=roadsmajor at PERMANENT profile_where=cat=193
Number,Distance,cat,dbl_1,dbl_2,int_1
1,2102.114,3,626907.14939778,228529.10079092,3
2,2960.822,1,626382.68026139,228917.44816672,1

Moritz
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