"Geometry has too many edges" This is the which keeps on coming on GEE

Question

I am trying to extract the data for the particular country using the shapefile for the province to get the daily precipitation data. But whenever I run the following code error displays:

ImageCollection (Error) Collection.geometry: Geometry has too many edges (2171869 > 2000000)

// Loading the data

var dataset = ee.ImageCollection("ECMWF/ERA5/MONTHLY")
              .filter(ee.Filter.calendarRange(1986,1987,'year'))
              .filter(ee.Filter.calendarRange(1,1,'month'))
              .filterBounds(table2); // Here table2 is the shapefile for the country's province.
              
var total_precipitation = dataset.select('total_precipitation');

print('total precipitation in Image Collection',total_precipitation);

But I can't change my boundary points as they are the predefined province of the country. I am stuck and unable to move ahead.

Answer 1

I think this is a Google Earth Engine limitation that can be workaround by simplifying the geometry - the following function will remove non-significant edges:

https://developers.google.com/earth-engine/apidocs/ee-geometry-simplify

example:

var table2_simplified = table2.simplify({'maxError': 1})
var dataset = ee.ImageCollection("ECMWF/ERA5/MONTHLY")
              .filter(ee.Filter.calendarRange(1986,1987,'year'))
              .filter(ee.Filter.calendarRange(1,1,'month'))
              .filterBounds(table2_simplified); // Here table2 is the shapefile for the country's province.
              
var total_precipitation = dataset.select('total_precipitation');

print('total precipitation in Image Collection',total_precipitation);

maxError can be estimated experimentally to get a trade-off between the number of edges and the loss of data.

After use, verify that the data loss is not too significant.