Include point coordinates in a string with Google Earth Engine using JavaScript

Question

I am making a time-series plot with data extracted from a point, and I would like to include the point coordinates in the title text.

e.g. 'Timeseries from point (61.08457, 6.03583)'

However, I can't see how to get the coordinates as a simple string object that can be concatenated neatly.

See the code below.

var centre_pt = (ee.Geometry.Point(6.10736, 61.49845));

var coordinates = (centre_pt.coordinates())
var lat = ee.Number(coordinates.get(1)).format('%.6f')
var long = ee.Number(coordinates.get(0)).format('%.6f')
var coordinates = (ee.String('(').cat(long).cat(', ').cat(lat).cat(')'));  

print(coordinates)

var title = ('Timeseries from point: ' + coordinates)
print(title)

When I print it, it comes up as:

Timeseries from point: ee.String({
  "type": "Invocation",
  "arguments": {
    "string1": {
      "type": "Invocation",
      "arguments": {
...etc

I don't want all the extra bits. How do I get just the coordinates to use in a concatenated string?

Padmanabha · Accepted Answer · 2022-11-06 13:52:19Z

1

The problem is with the title variable. It needs to be treated as an ee.String and cat() with the coordinates.

var title = ee.String('Timeseries from point: ').cat(coordinates)

Also, the 'coordinates' variable is overwritten here. You can rename the first one or simply avoid it.

var lat = ee.Number(centre_pt.coordinates().get(1)).format('%.6f')
var long = ee.Number(centre_pt.coordinates().get(0)).format('%.6f')
var coordinates = (ee.String('(').cat(long).cat(', ').cat(lat).cat(')'));

edited Nov 6, 2022 at 13:52

answered Nov 6, 2022 at 13:38

Padmanabha

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