retrieving a sample point as default value of coordinate attribute

I try to retrieving a sample point as default value of coordinate attribute.I used the demo sample points.

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my retrieving expression in IDM Expression Language is idm:samplingPointCoordinate(01,01).

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The coordinate system is also EPSG:4326 for my Survey.

in the preview I got empty form without default values.

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my collect version is 3.8.19.

let me know if I miss any detail Thanks,

mehrdad

collect

asked 20 Nov '15, 15:37

mehrdad
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accept rate: 0%

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Hi,
the expression is "almost" correct... the only thing to change is that the parameters must be text values, like this:
idm:samplingPointCoordinate('01','01')
In this way the retrieved coordinate will always be the one corresponding to level_1='01' and level_2='01', is it the behaviour you are expecting? It will be more useful to have a dynamic lookup of that coordinate, specifying a path to an attribute instead of a constant value.
Many thanks,
Open Foris Team

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answered 20 Nov '15, 18:25

Stefano (OF) ♦♦
4.8k●1●1●9
accept rate: 19%

now its work..! :) you right,that way is much more flexible. Now for a test I change it to idm:samplingPointCoordinate(concat('0',idm:position())) and work perfectly. Thanks.

(20 Nov '15, 18:51) mehrdad

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question asked: 20 Nov '15, 15:37

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last updated: 20 Nov '15, 18:51

retrieving a sample point as default value of coordinate attribute

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