Long time to import markers from Excel

[guesso87]

I am having Problems importing my .xls file. I can still copy and paste the
data. I was also wondering if there is a way I wouldn't have to reload the
whole xls file for additional markers. The process of loading 500 markers
takes very long and is time consuming if they are largely the same markers.

[chfung]

If you want to add additional markers from excel file without uploading
those imported, you can enter the row numbers into "Select row to
import" in the import dialog.

http://www.imapbuilder.com/gmap-builder/map-editor-user-guide/import_excel_spreadsheet_file.php

You may also include longitude and latitude data in your Excel file for
direct pinpointing, as address geocoding would take around 1 sec per entry.
The final speed depends on Google Maps server.