PointFieldMetadata Invalid array length

Metadata
1

Afternoon LEAF,

I am trying to display a point on the Globe for a data service that contains PointFieldMetadata that looks like so:

{
        "_id" : "545b93e3-11ef-4562-897f-56cc4fe27fa3",
        "version" : NumberLong(436),
        "dataChangeEvents" : {

        },
        "ancestryArray" : [
                {
                        "id" : "545b93e3-11ef-4562-897f-56cc4fe27fa3",
                        "type" : "TspiLight",
                        "separation" : 0
                }
        ],
        "foreignRefs" : [ ],
        "type" : "TspiLight",
        "alternateId" : "1286823e-8281-456d-8f3e-66d9076d3c70.missile",
        "idStateVector" : "1286823e-8281-456d-8f3e-66d9076d3c70.missile-SV436",
        "idOnOrbit" : "1286823e-8281-456d-8f3e-66d9076d3c70.missile",
        "pedigree" : "ORBIT_UPDATE",
        "covarianceArray" : "[0.00545120246887666, 0.0026330259976793443]",
        "thrustAccel" : 0.10351304667137952,
        "xpos" : -1433.5743382589774,
        "xvel" : -0.5443929956264034,
        "ypos" : 4478.412335905606,
        "yvel" : -0.9925431300273011,
        "zpos" : 4309.722029631882,
        "zvel" : -0.456459766090847,
        "flightPhase" : 7,
        "createdByUsername" : "AnonymousSystemUser",
        "lastModifiedByUsername" : "AnonymousSystemUser",
        "edition" : NumberLong(1),
        "qualifiedId" : "/545b93e3-11ef-4562-897f-56cc4fe27fa3",
        "qualifiedType" : "/TspiLight",
        "rootId" : "545b93e3-11ef-4562-897f-56cc4fe27fa3",
        "rootType" : "TspiLight",
        "geodeticPosition" : {
                "type" : "Point",
                "coordinates" : [
                        107.750267,
                        42.697329,
                        10.13
                ]
        },
        "createdDate" : NumberLong("1680723299416"),
        "ts" : NumberLong("1679945220001"),
        "lastModifiedDate" : NumberLong("1680723316899"),
        "displayLabel" : "1286823e-8281-456d-8f3e-66d9076d3c70.missile"
}

However, when I try to load the data on the Globe I get this:

Screenshot 2023-04-05 at 4.21.56 PM
Screenshot 2023-04-05 at 4.21.56 PM1157×506 238 KB

I am stumped as to where to look for the problem, any pointers would make my day.

sg

2

Are you able to share the code you’re using to load this data into Globe?

3

David, sorry for the delay, I am working two things at once.

Finding the code to show you is part of the problem. We are using a leaf 3.4.0-dev.5 clone of what used to be called the reference-app. The app uses these leaf dependencies;

    "@leaf-framework/core": "3.4.0-dev.5",
    "@leaf-framework/dashboard": "3.4.0-dev.5",
    "@leaf-framework/data-object-editor": "3.4.0-dev.5",
    "@leaf-framework/data-object-table": "3.4.0-dev.5",
    "@leaf-framework/globe": "3.4.0-dev.5",
    "@leaf-framework/map": "3.4.0-dev.5",
    "@leaf-framework/morph-map": "3.4.0-dev.5",
    "@leaf-framework/query-builder": "3.4.0-dev.5",
    "@leaf-framework/react": "3.4.0-dev.5",
    "@leaf-platform/service-discovery": "3.4.0-dev.5",

The error occurs at the instant I click “Save” in the overlay widget and the errors, as you can see, are not helpful in finding the problem.

A question back to you is, do you know where I would even begin to look? I don’t think we (my division) wrote any of the code involved. I would be happy to huddle in Slack and give you a live demo too.

Thank you again for your time/help.

sg

4

The LKB docs for setting up Globe states:

First, make sure you have an array of DataObjects with geometries properties. The array can be manually created in-memory or from a server. How you create your array determines which EntityCollection component you will use. If you create it in-memory, you will use DataObjectEntityCollection . If you create it from a server, you will need to use ServerBackedDataObjectEntityCollection .

Given that your exception is “invalid array length”, can you confirm that you’re passing Globe an array of DataObjects rather than a single DataObject?

5

Summarization:

I found my problem and the answer can be confusing, but I will try and summarize. I am running a leaf 3.4.0-dev.5 clone of what used to be referred to as the reference-app. My goal was to display a “point” on the leaf-globe. Back when the reference-app was a thing there were also a capability built in such that if you had a PointFieldMetadata as part of your dataObject it would show up on the 3D Globe or a 2D leaflet map. As this thread details, I created such a PointFieldMetadata but got the errors listed.

After lot’s of trial and error I found that all I needed to do was have root level fields in my dataObject named

  • latitude
  • longitude
  • altitude

I use them as Doubles.

I deleted the PointFieldMetadata all-together, ingested some fresh data with the new fields and the Point showed up on the map without any issues.

I wish I could give more specific details as to the cause of the Error, but this is all I know.

Thank you LEAF for all the help.

sg