I'm trying to do a supervised classification in ArcPro that will allow me to find Tar and Gravel rooftops in Miami. I have Landsat data but just wondering if there is imagery out there with better spacial resolution that might work better?
Sentinel-2 has a higher spatial resolution (10x10 m in VIS+NIR) compared with Landsat series (30x30 m, 15 m in panchromatic), so your results must be more accurate. Also, is a free to use sensor.
Here you can compare spectral resolutions:
Within the United States there is the National Agriculture Imagery Program (NAIP), which has 4-band imagery available every few years at 1m resolution. If you're using an ESRI product, it is very simple to load/analyze/export this data directly from the United States Department of Agriculture (USDA) Aerial Photography Field Office (APFO) via their Image Server: https://gis.apfo.usda.gov/arcgis/services
Note: This isn't a link that will open in a browser. You must add a new GIS Server in ArcGIS and point it to this address.
I have had great success with supervised classification between rocks and asphalt using NAIP and other 4-band imagery in the past.