Request: gx:labelVisibility for LineString

[Michael Hirsch]

KML syntax allows for automatically placing a text label at the midpoint of a LineString, which requires the phrase

<gx:labelVisibility>1</gx:labelVisibility> 

within the relevant <LineStyle> element.

however, there does not currently (simplekml v. 1.2.5) appear to be a way to set this gx:labelVisibility value in simplekml.

Example code fragment:

import simplekml

k = simplekml.Kml()

ls = k.newlinestring(name='My Line', coords=([(0,0),(1,1)]))

ls.style.linestyle.width=5

ls.style.linestyle.color=simplekml.Color.yellow

ls.style.labelstyle.scale=2

ls.style.labelstyle.color = simplekml.Color.blue

k.save('blah.kml')

Produces the KML

<?xml version="1.0" encoding="UTF-8"?>

<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2">

    <Document id="feat_1">

        <Style id="stylesel_0">

            <LabelStyle id="substyle_1">

                <color>ffff0000</color>

                <colorMode>normal</colorMode>

                <scale>2</scale>

            </LabelStyle>

            <LineStyle id="substyle_0">

                <color>ff00ffff</color>

                <colorMode>normal</colorMode>

                <width>5</width>

            </LineStyle>

        </Style>

        <Placemark id="feat_2">

            <name>My Line</name>

            <styleUrl>#stylesel_0</styleUrl>

            <LineString id="geom_0">

                <coordinates>0,0,0.0 1,1,0.0</coordinates>

            </LineString>

        </Placemark>

    </Document>

</kml>

but if I add the line

<gx:labelVisibility>1</gx:labelVisibility> 

within the 

<LineStyle id="substyle_0"> tag, I see a label "My Line"

is it possible to add this gxlabelvisibility parameter in simplekml so that I don't have to hand-edit the KML files?

E.g. it would be 

ls.style.labelstyle.gxlabelvisibility=1

Thanks.

[Kyle Lancaster]

Hi Michael,

Thanks for letting me know about the missing property. I will try my best to add it to simplekml within a week.

Regards,

Kyle

[Kyle Lancaster]

Hi Michael,

I have released version 1.2.6 with the property gxlabelvisibility added. Below is your example that I have updated to include the new property:

import simplekml

k = simplekml.Kml()

ls = k.newlinestring(name='My Line', coords=([(0,0),(1,1)]))

ls.style.linestyle.width=5

ls.style.linestyle.color=simplekml.Color.yellow

ls.style.labelstyle.scale=2

ls.style.labelstyle.color = simplekml.Color.blue

ls.style.linestyle.gxlabelvisibility = 1

k.save('blah.kml')

Please note that the gxlabelvisibility property was added to the linestyle and not to the labelstyle as you suggested. The KML Reference indicates that gx:labelVisibility is part of the linestyle.

Hope this makes your life a little bit easier!

Regards,

Kyle

[Kyle Lancaster]

Hi again,

Just released 1.2.7 :)

In 1.2.6 I made it so that the tag gx:labelVisibility was always included in the output KML, I have changed that in 1.2.7 so that if the value of gxlabelvisibility is not supplied it is not added to the output KML.

Regards,

Kyle

[Hirsch, Michael, Arthur]

Thanks very much Kyle!

---

From: simp...@googlegroups.com [simp...@googlegroups.com] on behalf of Kyle Lancaster [kyle...@gmail.com]
Sent: Sunday, February 08, 2015 05:40
To: simp...@googlegroups.com
Cc: Hirsch, Michael, Arthur
Subject: Re: Request: gx:labelVisibility for LineString

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