new 2025 screenshots

Author: justb4

docs/src/assets/images/screenshots/250410-hillshade-brt.jpg

@@ -8,3 +8,6 @@ Work in progress during 2025. Click on the first image to get
 a 'Lightbox' slide show with enlarged images.
 
 ![250128-parking-bgt](../assets/images/screenshots/250128-parking-bgt.jpg){ data-title="parking areas from BGT" }
+![250410-tumuli](../assets/images/screenshots/250410-tumuli.jpg){ data-title="New pois tumuli - grafheuvels" }
+![250410-hillshade-raw](../assets/images/screenshots/250410-hillshade-raw.jpg){ data-title="New Hillshade layer raw" }
+![250410-hillshade-brt](../assets/images/screenshots/250410-hillshade-brt.jpg){ data-title="Hillshade layer with BGT" }