From 3778405a13b9be11c3380864ff9904cd0adc8034 Mon Sep 17 00:00:00 2001
From: Jakob Cornell <jakob+gpg@jcornell.net>
Date: Wed, 20 May 2026 23:28:15 -0500
Subject: [PATCH] Separate parcel filter and render steps

---
 main.js | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/main.js b/main.js
index 2fc1445..39ae14d 100644
--- a/main.js
+++ b/main.js
@@ -5,6 +5,14 @@ const PARCEL_JSON_PATH = "//jcornell.net/static/parcels/Tax_Parcels_(Assessor_Pr
 
 const PARCEL_LOAD_KEY = "parcelsLoaded";
 
+const PICK_ZONINGS = new Set([
+	"SR-C1", "SR-C2", "SR-C3", "SR-V1", "SR-V2", "TR-C1", "TR-C2", "TR-C3",
+	"TR-C4", "TR-V1", "TR-V2", "TR-U1", "TR-U2", "TR-R", "TR-P"
+]);
+
+const MIN_LOT_SIZE_ACRES = 0.5;
+const MAX_LOT_SIZE_ACRES = 1.5;
+
 function transposeCoordinates(coordList) {
 	return coordList.map(
 		poly => poly.map(
@@ -40,9 +48,8 @@ async function asyncMain() {
 	}
 
 	const store = db.query("features", "readonly");
-	const PICK_ZONINGS = new Set(["TR-V2", "TR-U1", "TR-U2"]);
-	overlay.innerText = "filtering & rendering parcels";
-	let matchCount = 0;
+	overlay.innerText = "filtering parcels";
+	const matches = [];
 	let noZoningCount = 0;
 	let noLotSizeCount = 0;
 	// store.getAll doesn't work for some reason.
@@ -51,10 +58,8 @@ async function asyncMain() {
 			const zoningParts = (feature.properties.ZoningAll ?? "").split(", ");
 			const zoningMatch = zoningParts.length && new Set(zoningParts).intersection(PICK_ZONINGS).size;
 			const lotSizeAcres = feature.properties.LotSize / 43560;
-			if (zoningMatch && lotSizeAcres >= 0.5 && lotSizeAcres <= 1.5) {
-				const leafletCoords = transposeCoordinates(feature.geometry.coordinates);
-				L.polygon(leafletCoords, {color: "blue", weight: 1}).addTo(map);
-				matchCount += 1;
+			if (zoningMatch && lotSizeAcres >= MIN_LOT_SIZE_ACRES && lotSizeAcres <= MAX_LOT_SIZE_ACRES) {
+				matches.push(feature);
 			}
 			if (!zoningParts.length) {
 				noZoningCount += 1;
@@ -70,11 +75,17 @@ async function asyncMain() {
 	console.log(
 		"Searched %d parcels: %d matches, %d with no zoning, %d with no size",
 		await store.count(),
-		matchCount,
+		matches.length,
 		noZoningCount,
 		noLotSizeCount,
 	);
 
+	overlay.innerText = "rendering parcels";
+	for (const feature of matches) {
+		const leafletCoords = transposeCoordinates(feature.geometry.coordinates);
+		L.polygon(leafletCoords, {color: "blue", weight: 1}).addTo(map);
+	}
+
 	overlay.style["display"] = "none";
 }
 
-- 
2.39.5