It may feel strange but after all WKT handles just geometries as defined in the
standard https://portal.ogc.org/files/?artifact_id=25355. Perhaps the issue is
calling file with WKT and attributes as "WKT file" instead of calling it as
"CSV file with WKT".
Saving geometries into WKT is possible without any options because everything
is defined in the standard. There is no standard about CSV and therefore
options for selecting the separator etc. are needed.
But of course we want that it is easy to understand the meaning of different
file format options and appreciate all suggestions for improvements.
As a comparison in GDAL the single CSV driver offers the capabilities with and
without WKT https://gdal.org/drivers/vector/csv.html.
---
** [bugs:#494] Load WKT file with set options**
**Status:** pending
**Labels:** WKT WKT (set options)
**Created:** Thu Jul 30, 2020 08:54 AM UTC by János Tamás Kis
**Last Updated:** Thu Aug 06, 2020 08:53 AM UTC
**Owner:** michael michaud
**Attachments:**
-
[proba.jmp](https://sourceforge.net/p/jump-pilot/bugs/494/attachment/proba.jmp)
(6.5 kB; application/octet-stream)
-
[proba.wkt](https://sourceforge.net/p/jump-pilot/bugs/494/attachment/proba.wkt)
(149 Bytes; application/octet-stream)
-
[reverse.jmp](https://sourceforge.net/p/jump-pilot/bugs/494/attachment/reverse.jmp)
(7.2 kB; application/octet-stream)
-
[reverse.wkt](https://sourceforge.net/p/jump-pilot/bugs/494/attachment/reverse.wkt)
(149 Bytes; application/octet-stream)
I have a simple WKT file with an attribute data (like 'proba.wkt' file) where
the geomerty is in the second data field/column.
I have open it with the "wkt (set options)" function into a new project.
I have set the "Column containing WKT geometry" listbox to "2".
That was great: I could see the map and data.
I have saved the project as proba.jmp and I saw the
~~~
<key class="java.lang.String">WKT-Column</key>
<value class="java.lang.String">2</value>
~~~
lines in JMP file so I thought everyhing is OK, but when I tried reopen the JMP
file I got a java.lang.Exception:
> Field 1 is needed for geometry but [] has only 0 fields.
What was wrong...?
It's OK, I tried other way...
Let be the geometry in the first and the attribute data in the second data
field/column (like 'reverse.wkt' file) and open it (with "Column containing WKT
geometry" listbox to "1" option) and save the project (reverse.jmp). There are
the
~~~
<key class="java.lang.String">WKT-Column</key>
<value class="java.lang.String">1</value>
~~~
rows.
When I tried reopen then I got the
> Field 0 is needed for geometry but [] has only 0 fields
exception, similar before but the index is 0...
I am afraid, the JMP files are correct but the loader have wrong about indexing
besause it try load geometry from other column what I have set and stored in
JMP file or what am i wrong with?
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