diff --git a/main.js b/main.js
index ea0b32c..9e6f10f 100644
--- a/main.js
+++ b/main.js
@@ -132,6 +132,10 @@ for (let category of layerCategories) {
 const urlParams = qs.parse(window.location.search, { ignoreQueryPrefix: true });
 const urlLayers = ('layer' in urlParams) ? (typeof urlParams.layer === 'string' ? [urlParams.layer] : urlParams.layer) : [];
 
+if (urlLayers.length > 0) {
+  // Disable default-enabled layers if we're selecting layers via query params
+  layerCategories.forEach(c => c.layers.forEach(l => l.enabled = false));
+}
 for (let category of layerCategories) {
   for (let layer of category.layers) {
     if (urlLayers.includes(layer.name)) {