I've used Simplify Polygon with 'Maximum Allowable Offset' 250m, and then Aggregate Polygons with 'Aggregation Distance' also 250m (opposite order also tested). Still I have thin parts of polygons as below:
I presume that I need some minimum angle tool. But there are also thin inner parts like this: Yes, the width is only 35m, while I want objects have at least 250m. In this case propably 'Split Narrow Points' would be helpful, but I don't have this tool. Any ideas please?