You don’t need a land survey when you buy home insurance. Your home insurance provider really only needs to know the address of your home—your policy will cover the premises at that address. If there are any issues with the measurement of your property lines, it won’t fall under home insurance coverage anyway.
Accordingly, you may wish to have a survey done when you buy a new house (or ask the seller for a survey certificate). Even if you buy title insurance, you may not have coverage for issues arising from incorrect measurement of the property lines.