How to query Latitude/Longitude data from InfluxDB (Flux) for display in Grafana Geomap panel?

I have data from a vehicle's route in InfluxDB with geotagging in the variables Latitude and Longitude. I would like to display the data as Markers in a Grafana Geomap panel.

My query for the data in Grafana looks as below:

from(bucket: v.defaultBucket)
  |> range(start: v.timeRangeStart, stop: v.timeRangeStop)
  |> filter(fn: (r) => r["_measurement"] == "1F4F8F26")
  |> filter(fn: (r) => r["_field"] == "Latitude" or r["_field"] ==  "Longitude")
  |> aggregateWindow(every: v.windowPeriod, fn: median)
  |> yield(name: "median")

This query lets me plot the data as in the following picture:

In table form, the data looks as follows (note how I can switch between display Latitude and Longitude separately):

The problem is that when I try to use a Geomap panel, nothing is displayed as per below:

I have tried also with a restructuring of my data into a Time, Latitude, Longitude format via below query:

from(bucket: v.defaultBucket)
  |> range(start: v.timeRangeStart, stop: v.timeRangeStop)
  |> filter(fn: (r) => r["_measurement"] == "1F4F8F26")
  |> filter(fn: (r) => r["_field"] == "Latitude" or r["_field"] ==  "Longitude")
  |> aggregateWindow(every: v.windowPeriod, fn: median)
  |> yield(name: "median")
  |> pivot(rowKey:["_time"], columnKey: ["_field"], valueColumn: "_value")

However, this still does not enable me to display the points as markers in Grafana. Any inputs are welcome.

I suggest to remove the aggregation function.

I'm using this query with Geomap:

import "influxdata/influxdb/schema"

from(bucket: "fleet")
  |> range(start: v.timeRangeStart, stop: v.timeRangeStop)
  |> range(start: r._measurement == "points")
  |> filter(fn: (r) => r._field == "lat" or r._field == "lon" or r._field == "alt" or r._field == "speed")
  |> schema.fieldsAsCols()
  |> group()
  |> sort(columns: ["_time"])

Seems that geomap does not handle well grouped data, therefore pivoted data are ungrouped (and then sort is needed to get correct order).