From b1283ee0e0a427de34e5baec93060fdc8a2c9fc9 Mon Sep 17 00:00:00 2001
From: Geoff Jacobsen <gjacobson@linz.govt.nz>
Date: Mon, 11 May 2020 16:35:54 +1200
Subject: [PATCH] fix(cog): add padding to projwin'

Was sometimes one pixel short on lower right sides

Now add 1% padding to lower right sides
---
 packages/cog/src/cog/__test__/cog.test.ts | 6 +++---
 packages/cog/src/cog/cog.ts               | 4 +++-
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/packages/cog/src/cog/__test__/cog.test.ts b/packages/cog/src/cog/__test__/cog.test.ts
index dfbc2bdd0..96ec92e50 100644
--- a/packages/cog/src/cog/__test__/cog.test.ts
+++ b/packages/cog/src/cog/__test__/cog.test.ts
@@ -37,7 +37,7 @@ o.spec('cog', () => {
             // -projwin 18472078.003508832 -5948635.289265559 18785164.071364917 -6261721.357121641
             // -projwin_srs EPSG:3857
             o(gdalCogBuilder!.config).deepEquals({
-                bbox: [18472078.003508832, -5948635.289265559, 18785164.071364917, -6261721.357121641],
+                bbox: [18472078.003508832, -5948635.289265559, 18788294.932043478, -6264852.217800202],
                 alignmentLevels: 6,
                 compression: 'webp',
                 resampling: 'bilinear',
@@ -71,8 +71,8 @@ o.spec('cog', () => {
                 '-projwin',
                 '18472078.003508832',
                 '-5948635.289265559',
-                '18785164.071364917',
-                '-6261721.357121641',
+                '18788294.932043478',
+                '-6264852.217800202',
                 '-projwin_srs',
                 'EPSG:3857',
                 '/tmp/test.vrt',
diff --git a/packages/cog/src/cog/cog.ts b/packages/cog/src/cog/cog.ts
index 46aaa7539..1a562fd7a 100644
--- a/packages/cog/src/cog/cog.ts
+++ b/packages/cog/src/cog/cog.ts
@@ -54,12 +54,14 @@ export async function buildCogForQuadKey(
     const [ulX, ulY] = forward([left, upper]);
     const [lrX, lrY] = forward([right, lower]);
 
+    const padding = Math.max(Math.abs(lrY - ulY), Math.abs(lrX - ulX)) * 0.01;
+
     const [x, y, z] = QuadKey.toXYZ(quadKey);
 
     const alignmentLevels = job.source.resolution - z;
 
     const cogBuild = new GdalCogBuilder(vrtLocation, outputTiffPath, {
-        bbox: [ulX, ulY, lrX, lrY],
+        bbox: [ulX, ulY, lrX + padding, lrY - padding],
         alignmentLevels,
         resampling: job.output.resampling,
         quality: job.output.quality,