I´ve a shapefile with several fields. Two of those fields as a type of Widget "Value Map", but when i import to my Locus GIS app, the fields lose the Widget and the scroll values that are attached.
Can or how i solvet it?
Thanks,
Alex
Best Answer
P
Petr Voldan
said
over 4 years ago
Hi Alex,
The functionality you mentioned is enabled by QGIS not by format (I think) but it doesn't matter.
LocusGIS doesn't support any validation of the field value at this moment, but you can use enumeration as you mentioned. There is a workaround how to quickly define multiple enumeration values:
create empty layer and define the attributes you can use for mapping. Define enumeration attribute and add at least one value
export layer as template
template is a XML file that you can edit in any text editor
search section for your enumeration attribute and edit the <options> parameter.
the particular values are separated by | "pipe". See the example bellow
<options>Beech|Maple|Oak|Spruce</options>
Save the template
Open LocusGIS and "Create new layer from the template"
Using this workaround you can create the enumeration attribute with multiple values. On the other side I'm not sure if will be usable with thousands of values.
I'm sorry but SHP format doesn't support (at least as I know) the "value map" field. On the other side there is no way how to import the SHP file and create the "Value map" attribute from imported data at this moment. There is already a feature request that focus on conversion of data types of layer attributes - maybe it could solve this issue.
BTW: what's your use-case, please? What's the source for your SHP file, please?
Thank you
Petr
A
Alex Oliveira
said
over 4 years ago
Petr,
I´m not talking about field type, but Field Widget. In Locus GIS, if you create a layer, is the similar to Enumeration, but the difference is that Enumeration need a Database connetion (PostGIS or similar), and the Value Map Widget you can create a combo box.
My case: I create a shapefile (point) with several fields with the purpose to colect data related to Biodiversity. In two of those fields, i want to the user don´t write the species but instead choose from a combo box the species that he/she see.
I know that in Locus GIS i can create a layer and defined my combo with the Enumeration choice, but there are more than 5000 species to put (imagine the task).
With Qgis, i can create a shapefile and associate a CSV file to create the combo box in a bit, but when i import to Locus it delete my field combo.
Petr Voldan
said
over 4 years ago
Answer
Hi Alex,
The functionality you mentioned is enabled by QGIS not by format (I think) but it doesn't matter.
LocusGIS doesn't support any validation of the field value at this moment, but you can use enumeration as you mentioned. There is a workaround how to quickly define multiple enumeration values:
create empty layer and define the attributes you can use for mapping. Define enumeration attribute and add at least one value
export layer as template
template is a XML file that you can edit in any text editor
search section for your enumeration attribute and edit the <options> parameter.
the particular values are separated by | "pipe". See the example bellow
<options>Beech|Maple|Oak|Spruce</options>
Save the template
Open LocusGIS and "Create new layer from the template"
Using this workaround you can create the enumeration attribute with multiple values. On the other side I'm not sure if will be usable with thousands of values.
Petr
A
Alex Oliveira
said
over 4 years ago
Hello again Petr,
it works! And i made a test with more than a thousand names and works fine!
Thanks a lot!
Petr Voldan
said
over 4 years ago
Hi,
great, I'm glad to hear it.
BTW: is the enumeration with thousand names usable?
Petr
A
Alex Oliveira
said
over 4 years ago
Yes, is the species that are in our Portuguese catalog.
A question: you can´t with on Field filter the other. Exemple: if the user choose, in the field Name, Bird, the next field, for example, Specie, only apear the Birds species of the thousand inicialy loaded.
Petr Voldan
said
over 4 years ago
I see something like conditional or structured forms. Unfortunately such feature is missing in the app. Would you please create a new feature request (here on the forum) and describe the idea, use-case, etc.
Alex Oliveira
Hello,
I´ve a shapefile with several fields. Two of those fields as a type of Widget "Value Map", but when i import to my Locus GIS app, the fields lose the Widget and the scroll values that are attached.
Can or how i solvet it?
Thanks,
Alex
Hi Alex,
The functionality you mentioned is enabled by QGIS not by format (I think) but it doesn't matter.
LocusGIS doesn't support any validation of the field value at this moment, but you can use enumeration as you mentioned. There is a workaround how to quickly define multiple enumeration values:
Using this workaround you can create the enumeration attribute with multiple values. On the other side I'm not sure if will be usable with thousands of values.
Petr
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Sorted by Oldest FirstPetr Voldan
Dear Alex,
I'm sorry but SHP format doesn't support (at least as I know) the "value map" field. On the other side there is no way how to import the SHP file and create the "Value map" attribute from imported data at this moment. There is already a feature request that focus on conversion of data types of layer attributes - maybe it could solve this issue.
BTW: what's your use-case, please? What's the source for your SHP file, please?
Thank you
Petr
Alex Oliveira
Petr,
I´m not talking about field type, but Field Widget. In Locus GIS, if you create a layer, is the similar to Enumeration, but the difference is that Enumeration need a Database connetion (PostGIS or similar), and the Value Map Widget you can create a combo box.
My case: I create a shapefile (point) with several fields with the purpose to colect data related to Biodiversity. In two of those fields, i want to the user don´t write the species but instead choose from a combo box the species that he/she see.
I know that in Locus GIS i can create a layer and defined my combo with the Enumeration choice, but there are more than 5000 species to put (imagine the task).
With Qgis, i can create a shapefile and associate a CSV file to create the combo box in a bit, but when i import to Locus it delete my field combo.
Petr Voldan
Hi Alex,
The functionality you mentioned is enabled by QGIS not by format (I think) but it doesn't matter.
LocusGIS doesn't support any validation of the field value at this moment, but you can use enumeration as you mentioned. There is a workaround how to quickly define multiple enumeration values:
Using this workaround you can create the enumeration attribute with multiple values. On the other side I'm not sure if will be usable with thousands of values.
Petr
Alex Oliveira
Hello again Petr,
it works! And i made a test with more than a thousand names and works fine!
Thanks a lot!
Petr Voldan
Hi,
great, I'm glad to hear it.
BTW: is the enumeration with thousand names usable?
Petr
Alex Oliveira
Yes, is the species that are in our Portuguese catalog.
A question: you can´t with on Field filter the other. Exemple: if the user choose, in the field Name, Bird, the next field, for example, Specie, only apear the Birds species of the thousand inicialy loaded.
Petr Voldan
I see something like conditional or structured forms. Unfortunately such feature is missing in the app. Would you please create a new feature request (here on the forum) and describe the idea, use-case, etc.
Thanks, Petr
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