From 43cdd633f08152c8fe659f04d234b67c3a07250c Mon Sep 17 00:00:00 2001
From: Daniel Barlow <dan@telent.net>
Date: Wed, 28 May 2025 15:28:09 +0100
Subject: [PATCH] some notes about tiles

---
 README | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/README b/README
index b6ce5f4..1a67077 100644
--- a/README
+++ b/README
@@ -121,6 +121,7 @@ https://git.syndicate-lang.org/tonyg/squeak-phone/raw/commit/474960ddc665ed445a1
 
 we need to extend to multiple tiles'-worth of map
 
+
 * get tile for curent lat/long and request overpass data for enough
   surrounding tiles to fill the screen
 
@@ -133,9 +134,8 @@ them if the come up again
 * to get it centred on the cyclist, take the tile fractional part *
   256, and translate the canvas up and left by that amount
 
+* add a cache of [x,y,z] -> polylines so that we don't keep hitting overpass
 
 
-and offset
-by