diff --git a/wasm/html_demo/index.js b/wasm/html_demo/index.js
index 56f0a31..cd3a7db 100644
--- a/wasm/html_demo/index.js
+++ b/wasm/html_demo/index.js
@@ -187,7 +187,8 @@ async function file_selected(el) {
         let window_lrms = window.Alpine.store('lrms')
 
         window_lrms.selectedFeature = curves_features[lrm_id];
-        window_lrms.pkStart = projection.measure.anchor_name + '+' + Math.round(projection.measure.scale_offset);
+        let offset = Math.round(projection.measure.scale_offset)
+        window_lrms.pkStart = projection.measure.anchor_name + '+' + String(offset).padStart(3, "0");
 
         window_lrms.startMeasure = projection.measure;
         let point = lrs.resolve(lrm_id, projection.measure)
diff --git a/wasm/src/lib.rs b/wasm/src/lib.rs
index 16fde4d..1bb0e20 100644
--- a/wasm/src/lib.rs
+++ b/wasm/src/lib.rs
@@ -25,7 +25,9 @@ pub struct Point {
 
 #[wasm_bindgen]
 impl Point {
-    /// Build a new [`LrmMeasure`] from an [`Anchor`] `name` and the `offset` on the [`LrmScale`].
+    /// Build a new geographical point.
+    ///
+    /// When using spherical coordinates, longitude is x and latitude y
     #[wasm_bindgen(constructor)]
     pub fn new(x: f64, y: f64) -> Self {
         Self { x, y }