From: Jakob Cornell <jakob+gpg@jcornell.net>
Date: Thu, 21 May 2026 04:28:23 +0000 (-0500)
Subject: Fly map to bounds of results after rendering
X-Git-Url: https://jcornell.net/gitweb/gitweb.cgi?a=commitdiff_plain;h=9f323a9d5f2e623f11a94d597a492d0b85d829d0;p=ntbd-parcels.git

Fly map to bounds of results after rendering
---

diff --git a/main.js b/main.js
index 39ae14d..8c70cbb 100644
--- a/main.js
+++ b/main.js
@@ -86,7 +86,31 @@ async function asyncMain() {
 		L.polygon(leafletCoords, {color: "blue", weight: 1}).addTo(map);
 	}
 
+	// fly to a view that fits all matches in frame
+	let flyBounds = null;
+	if (matches.length) {
+		let minLat = Infinity;
+		let minLon = Infinity;
+		let maxLat = -Infinity;
+		let maxLon = -Infinity;
+		for (const feature of matches) {
+			// extract flat coordinates of all positive polygons
+			const coordinates = feature.geometry.coordinates.flatMap(poly => poly[0]);
+			const longitudes = coordinates.map(([lon, lat]) => lon);
+			const latitudes = coordinates.map(([lon, lat]) => lat);
+			minLat = Math.min(minLat, ...latitudes);
+			minLon = Math.min(minLon, ...longitudes);
+			maxLat = Math.max(maxLat, ...latitudes);
+			maxLon = Math.max(maxLon, ...longitudes);
+		}
+		flyBounds = L.latLngBounds(L.latLng(minLat, minLon), L.latLng(maxLat, maxLon));
+	}
+
+	console.log(flyBounds);
 	overlay.style["display"] = "none";
+	if (flyBounds !== null) {
+		map.flyToBounds(flyBounds);
+	}
 }
 
 const map = L.map("map");