diff --git a/inventory/static/js/components/draw.js b/inventory/static/js/components/draw.js
index 5d6ab97..8b8969f 100644
--- a/inventory/static/js/components/draw.js
+++ b/inventory/static/js/components/draw.js
@@ -1562,7 +1562,8 @@ function initGridWidget(root, opts = {}) {
 
             if (pts.length >= 2) {
                 const coarse = [pts[0]];
-                const minStep = 0.02;
+                const minStepPx = 0.75;
+                const minStep = minStepPx / cellSize;
                 for (let i = 1; i < pts.length; i++) {
                     if (dist2(pts[i], coarse[coarse.length - 1]) >= minStep * minStep) {
                         coarse.push(pts[i]);