more README details

README.md

@@ -4,24 +4,53 @@ PMTiles is a single-file archive format for tiled data. A PMTiles archive can be
 
 For those familiar with [Cloud Optimized GeoTIFFs](https://www.cogeo.org) - PMTiles uses similar techniques, but is specific to Z/X/Y tiles and can store vector data.
 
-# Compatible Storage Providers
+
+# Map Libraries
+
+## Leaflet
+
+## MapLibre GL
+
+# Storage Providers
 
 PMTiles files require servers to support [HTTP byte serving](https://developer.mozilla.org/en-US/docs/Web/HTTP/Range_requests) as well as [CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS). It's been tested with:
 
-* [Amazon Web Services S3](#amazon-web-services)
+* [Amazon S3](#amazon-s3)
 * [Google Cloud Storage](#google-cloud)
 * [Microsoft Azure](#azure)
 * [DigitalOcean Spaces](#digitalocean-spaces)
 * [Backblaze B2](#backblaze-b2)
 * Your own HTTP server
 
-### Amazon Web Services
+### Amazon S3
 
-* ACL Level
+1. From your S3 Bucket's "Permissions" tab, scroll to the Cross-origin resource sharing (CORS) editor.
-* CORS Policy
+2. Add this JSON policy, replacing "https://example.com" with your domains or "\*" for all domains. See [The S3 CORS documentation](https://docs.aws.amazon.com/AmazonS3/latest/userguide/cors.html).
+
+
+    [
+        {
+            "AllowedHeaders": ["Range"],
+            "AllowedMethods": ["GET","HEAD"],
+            "AllowedOrigins": ["https://example.com"]
+        }
+    ]
+
+3. Ensure that your S3 objects have public read access.
 
 ### Google Cloud
 
+* See the [Cloud Storage CORS documentation](https://cloud.google.com/storage/docs/cross-origin)
+
+
+    [
+        {
+          "origin": ["https://example.com"],
+          "method": ["GET","HEAD"],
+          "responseHeader": ["range"],
+          "maxAgeSeconds": 300
+        }
+    ]
 
 ### Azure
 * HEAD requests for ranges return 200 instead of 206
@@ -31,3 +60,15 @@ PMTiles files require servers to support [HTTP byte serving](https://developer.m
 
 
 ### Backblaze B2
+* See [B2 CORS Rules](https://www.backblaze.com/b2/docs/cors_rules.html)
+
+
+    [
+        {
+          "corsRuleName": "allowHeaders",
+          "allowedOrigins": ["https://example.com"],
+          "allowedOperations":["b2_download_file_by_name"],
+          "allowedHeaders": ["range"],
+          "maxAgeSeconds": 300
+        }
+    ]