Adding uploaded polygon measurement style to KML file polygons

Question

Following up on QGIS: multiple map measurements I want to use a style to convert a kml layer to have measurements on all size, kind of like:

I'm using QGIS 3.28 LTE. I started by downloading the style from https://plugins.qgis.org/styles/21/ which is a zip file. I extracted the contained xml file and uploaded it using the setting -> style manager option

If I look in the style manager I now have:

I've installed the KML tools plugin and used this to create a polygon layer from the kml layer . Next I double clicked on the output polygon label , and added the " Measure feet " Label.

However when I look at the polygon layer, I see:

The KML file:

<?xml version="1.0" encoding="utf-8" ?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document id="root_doc">
<Schema name="2963760840" id="2963760840">
    <SimpleField name="timestamp" type="string"></SimpleField>
    <SimpleField name="begin" type="string"></SimpleField>
    <SimpleField name="end" type="string"></SimpleField>
    <SimpleField name="altitudeMode" type="string"></SimpleField>
    <SimpleField name="tessellate" type="int"></SimpleField>
    <SimpleField name="extrude" type="int"></SimpleField>
    <SimpleField name="visibility" type="int"></SimpleField>
    <SimpleField name="drawOrder" type="int"></SimpleField>
    <SimpleField name="icon" type="string"></SimpleField>
</Schema>
<Folder><name>2963760840</name>
<Placemark>
    <Style><LineStyle><color>ff0000ff</color></LineStyle><PolyStyle><fill>0</fill></PolyStyle></Style>
    <ExtendedData><SchemaData schemaUrl="#2963760840">
        <SimpleData name="tessellate">-1</SimpleData>
        <SimpleData name="extrude">0</SimpleData>
        <SimpleData name="visibility">-1</SimpleData>
    </SchemaData></ExtendedData>
    <Polygon><outerBoundaryIs><LinearRing><coordinates>-88.4317405175818,31.6558800962605 -88.431737410907,31.6559161822374 -88.4317340478576,31.6559522520483 -88.4317304294607,31.65598830298 -88.4317265546618,31.6560243350402 -88.4317224234424,31.6560603464253 -88.4317180368385,31.656096335324 -88.4317133937868,31.6561323008421 -88.4317084963772,31.6561682411606 -88.4317033435555,31.6562041562871 -88.4316979352941,31.6562400435163 -88.4316922726381,31.6562759019385 -88.4316863545151,31.6563117297579 -88.4316801819788,31.6563475269666 -88.4316737560565,31.6563832908516 -88.4316670756934,31.6564190214205 -88.4316601419166,31.6564547159601 -88.4316529536625,31.6564903735763 -88.4316455130305,31.6565259933519 -88.431637818957,31.6565615743927 -88.4316298724689,31.6565971139855 -88.431621673566,31.6566326121303 -88.4316132232843,31.6566680670158 -88.4316045205513,31.6567034768459 -88.4315955664119,31.6567388407112 -88.431586360857,31.6567741577097 -88.4315817286416,31.6567915607419 -88.4311466897599,31.6584809674529 -88.4311356263598,31.658529215528 -88.431124815372,31.6585775059521 -88.431114256788,31.6586258378234 -88.4311039516355,31.658674208429 -88.4310938999238,31.6587226186706 -88.4310841005811,31.6587710667524 -88.431074554662,31.6588195526667 -88.4310652631943,31.6588680737005 -88.4310562240697,31.6589166298692 -88.4310474404426,31.6589652202479 -88.4310389101867,31.6590138430485 -88.4310306343658,31.6590624991651 -88.4310226129532,31.6591111858924 -88.4310148459404,31.6591599023285 -88.4310073343821,31.6592086484659 -88.4310000772153,31.6592574234104 -88.4309930754678,31.6593062244489 -88.430986329149,31.6593550524834 -88.4309798382413,31.6594039057101 -88.4309736027451,31.6594527841292 -88.4309720419662,31.6594653415 -88.4309644366008,31.6595394733955 -88.4309570876343,31.6596136241626 -88.4309499950584,31.6596877928994 -88.4309431588736,31.659761979606 -88.4309365790716,31.6598361833805 -88.4309302545895,31.6599104033289 -88.4309241875368,31.6599846394358 -88.4309183768417,31.6600588899053 -88.4309128225048,31.6601331547375 -88.4309075245268,31.6602074339324 -88.4309024839445,31.6602817256786 -88.4308976996953,31.6603560290821 -88.4308931717888,31.6604303450447 -88.4308889012709,31.660504672657 -88.43088488707,31.6605790101229 -88.4308831265363,31.6606132013205 -88.430880160709,31.6606753008115 -88.4308774511835,31.6607374083529 -88.4308749990237,31.6607995248388 -88.4308728042029,31.6608616475637 -88.4308708656675,31.6609237765354 -88.4308691844632,31.6609859108443 -88.4308677605907,31.6610480504906 -88.4308665929691,31.6611101927763 -88.4308656826711,31.6611723394975 -88.4308650296705,31.6612344879487 -88.430864901764,31.6612506351474 -88.4326782034786,31.6612204116202 -88.432897502907,31.6542440681409 -88.4317454858576,31.6541186481987 -88.4317646239949,31.6548099837846 -88.431765521614,31.65484436124 -88.4317663085529,31.6548787413071 -88.4317669858568,31.6549131230762 -88.4317675535255,31.6549475065475 -88.4322256604991,31.6549477172071 -88.4321986103415,31.6558080866836 -88.4317459607727,31.6558078776201 -88.4317433668281,31.6558439941254 -88.4317405175818,31.6558800962605</coordinates></LinearRing></outerBoundaryIs></Polygon>
</Placemark>
</Folder>
</Document></kml>

I don't see any measurements. What am I doing wrong?

Edit1: Regarding: "Select a projected CRS with feet as unit (as we don't know where in the world is your area of interest we can't suggest any, if you have other data in the same area that use a projected CRS in feet you are probably safe using the same…)" -

I'm working in Alabama, but the crs systems from there use meters. At random I picked 1 from New Mexico which had feet as the units. Does this matter?

I'm not sure what to do here.

Answer 1

These style are designed to not show any measurement if the the layer unit is not in meter or feet (depending on the style you use). As you use KML you are in necessarily in degree so it won't work.

You need to export your data in another format (as KML can only be in degree) and reproject it in projected CSR suitable for measurement in feet in your area. You can do both in a single operation :

Right click on your layer an choose Export>Save Feature As... then in the window that open:

• Choose your export format (if you don't know or don't have a favorite the default GeoPackage is a good choice)
• Click on the three dot right to the "file name" input and select a location and name to save your new layer
• Select a projected CRS with feet as unit (as we don't know where in the world is your area of interest we can't suggest any, if you have other data in the same area that use a projected CRS in feet you are probably safe using the same…)
• Let all other option as default (you may check the "Add saved file to map" at the bottom to automatically load the reprojected layer) and click OK
• Style your new layer using using the "Measure Feet" symbol