README.md in armg-0.10.0 vs README.md in armg-0.11.0

@@ -153,9 +153,17 @@
 $ ridgepole -c 'mysql2://root@127.0.0.1:10057/armg_test' -r armg,ridgepole-geo -a
 Apply `Schemafile`
 No change
 ```
 
+## Limitation on MySQL 8.0
+
+At the moment, armg gem supports only SRIDs with long-lat axis order in MySQL 8.0.
+e.g. SRID=3857 (WGS 84 / Pseudo-Mercator -- Spherical Mercator, Google Maps, OpenStreetMap, Bing, ArcGIS, ESRI)
+
+That is, armg does not support SRIDs with lat-long axis order.
+e.g. SRID=4326 (WGS 84 -- WGS84 - World Geodetic System 1984, used in GPS)
+
 ## Related links
 
 * [rgeo/rgeo: Geospatial data library for Ruby](https://github.com/rgeo/rgeo)
 * [MySQL :: MySQL 5.7 Reference Manual :: 11.5.3 Supported Spatial Data Formats](https://dev.mysql.com/doc/refman/5.7/en/gis-data-formats.html)