OpenStreetMap is fantastic because it allows you to update the map of your own garden by just setting up an account and get started. To help you get going, you may find this tutorial helpful: : https://www.youtube.com/watch?v=5q7ypL0Osqc
We use vector maps from OpenStreetMap in Hortis, which are generated on a 4 week cycle. Your changes will not appear in Hortis straightaway, and it might take a few weeks before they do.
OpenStreetMap offers many options, but remember that not all "feature types" will be visible in Hortis.
Below are the feature types we recommend you use:
Line
Bridge
Bridleway
Culvert
Footpath
Pedestrian way
Residential road
River
Service Road
Stream
Area
Building
Forest
Garden
Glasshouse
Grass
Meadow
Park
Swimming pool
Water
Wood
Here is a list of OSM feature types that will not be visible in Hortis:
Points
Picnic table
Artwork
Tree
Cafe
Node
Line
Way
Miniature rail
Area
Shelter
Flower bed
Sports pitch
Farmyard
Graveyard
School
Parking
Playground
Parking space
Railway platform