Use generate_terrain in sky view factor notebook, clear all notebook outputs

Switch 24_Sky_View_Factor from hand-crafted sinusoidal terrain to
generate_terrain with ridged noise and domain warping. Add overlay
blend composite panel showing hillshade + SVF together. Clear outputs
from all user guide notebooks.

Author: brendancol

examples/user_guide/12_Flood_Analysis.ipynb

@@ -42,14 +42,7 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "imports",
-   "metadata": {
-    "execution": {
-     "iopub.execute_input": "2026-03-13T02:48:12.809031Z",
-     "iopub.status.busy": "2026-03-13T02:48:12.808873Z",
-     "iopub.status.idle": "2026-03-13T02:48:15.149242Z",
-     "shell.execute_reply": "2026-03-13T02:48:15.148679Z"
-    }
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "%matplotlib inline\n",
@@ -78,14 +71,7 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "load-dem",
-   "metadata": {
-    "execution": {
-     "iopub.execute_input": "2026-03-13T02:48:15.150597Z",
-     "iopub.status.busy": "2026-03-13T02:48:15.150328Z",
-     "iopub.status.idle": "2026-03-13T02:48:17.828701Z",
-     "shell.execute_reply": "2026-03-13T02:48:17.828047Z"
-    }
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "try:\n",
@@ -126,14 +112,7 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "hydro-setup",
-   "metadata": {
-    "execution": {
-     "iopub.execute_input": "2026-03-13T02:48:17.829970Z",
-     "iopub.status.busy": "2026-03-13T02:48:17.829696Z",
-     "iopub.status.idle": "2026-03-13T02:48:18.999397Z",
-     "shell.execute_reply": "2026-03-13T02:48:18.998831Z"
-    }
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "# Fill depressions, resolve flats, compute flow direction and accumulation.\n",
@@ -157,14 +136,7 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "basemap",
-   "metadata": {
-    "execution": {
-     "iopub.execute_input": "2026-03-13T02:48:19.000845Z",
-     "iopub.status.busy": "2026-03-13T02:48:19.000727Z",
-     "iopub.status.idle": "2026-03-13T02:48:19.338846Z",
-     "shell.execute_reply": "2026-03-13T02:48:19.338124Z"
-    }
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "# Build a hillshade basemap we'll reuse throughout\n",
@@ -214,14 +186,7 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "hand",
-   "metadata": {
-    "execution": {
-     "iopub.execute_input": "2026-03-13T02:48:19.340736Z",
-     "iopub.status.busy": "2026-03-13T02:48:19.340620Z",
-     "iopub.status.idle": "2026-03-13T02:48:19.901710Z",
-     "shell.execute_reply": "2026-03-13T02:48:19.901260Z"
-    }
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "hand_raster = xrspatial.hand(flow_dir, flow_accum, dem_filled, threshold=threshold)\n",
@@ -265,14 +230,7 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "inundation",
-   "metadata": {
-    "execution": {
-     "iopub.execute_input": "2026-03-13T02:48:19.904535Z",
-     "iopub.status.busy": "2026-03-13T02:48:19.904425Z",
-     "iopub.status.idle": "2026-03-13T02:48:19.912541Z",
-     "shell.execute_reply": "2026-03-13T02:48:19.912025Z"
-    }
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "for wl in [2, 5, 10, 20]:\n",
@@ -286,14 +244,7 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "inundation-viz",
-   "metadata": {
-    "execution": {
-     "iopub.execute_input": "2026-03-13T02:48:19.913599Z",
-     "iopub.status.busy": "2026-03-13T02:48:19.913498Z",
-     "iopub.status.idle": "2026-03-13T02:48:20.201718Z",
-     "shell.execute_reply": "2026-03-13T02:48:20.200986Z"
-    }
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "# Visualize the 10 m flood extent\n",
@@ -339,14 +290,7 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "depth",
-   "metadata": {
-    "execution": {
-     "iopub.execute_input": "2026-03-13T02:48:20.203145Z",
-     "iopub.status.busy": "2026-03-13T02:48:20.203019Z",
-     "iopub.status.idle": "2026-03-13T02:48:20.469517Z",
-     "shell.execute_reply": "2026-03-13T02:48:20.468837Z"
-    }
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "depth = flood_depth(hand_raster, water_level=10)\n",
@@ -384,14 +328,7 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "cn-scalar",
-   "metadata": {
-    "execution": {
-     "iopub.execute_input": "2026-03-13T02:48:20.470974Z",
-     "iopub.status.busy": "2026-03-13T02:48:20.470859Z",
-     "iopub.status.idle": "2026-03-13T02:48:20.478920Z",
-     "shell.execute_reply": "2026-03-13T02:48:20.478270Z"
-    }
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "# 100 mm rainfall everywhere\n",
@@ -419,14 +356,7 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "cn-spatial",
-   "metadata": {
-    "execution": {
-     "iopub.execute_input": "2026-03-13T02:48:20.480047Z",
-     "iopub.status.busy": "2026-03-13T02:48:20.479949Z",
-     "iopub.status.idle": "2026-03-13T02:48:20.764827Z",
-     "shell.execute_reply": "2026-03-13T02:48:20.764276Z"
-    }
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "# Simple CN map: low HAND -> urban-ish (CN=85), high HAND -> forested (CN=55)\n",
@@ -477,14 +407,7 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "tt-inputs",
-   "metadata": {
-    "execution": {
-     "iopub.execute_input": "2026-03-13T02:48:20.766341Z",
-     "iopub.status.busy": "2026-03-13T02:48:20.766235Z",
-     "iopub.status.idle": "2026-03-13T02:48:21.170917Z",
-     "shell.execute_reply": "2026-03-13T02:48:21.170083Z"
-    }
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "slope_raster = xrspatial.slope(dem_filled)\n",
@@ -500,14 +423,7 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "tt-compute",
-   "metadata": {
-    "execution": {
-     "iopub.execute_input": "2026-03-13T02:48:21.172210Z",
-     "iopub.status.busy": "2026-03-13T02:48:21.172107Z",
-     "iopub.status.idle": "2026-03-13T02:48:21.478814Z",
-     "shell.execute_reply": "2026-03-13T02:48:21.478274Z"
-    }
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "# Manning's n = 0.03 is typical for natural channels.\n",
@@ -534,14 +450,7 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "tt-compare",
-   "metadata": {
-    "execution": {
-     "iopub.execute_input": "2026-03-13T02:48:21.481411Z",
-     "iopub.status.busy": "2026-03-13T02:48:21.481303Z",
-     "iopub.status.idle": "2026-03-13T02:48:21.491759Z",
-     "shell.execute_reply": "2026-03-13T02:48:21.491111Z"
-    }
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "# Compare roughness: smoother surface (channel) vs rougher (vegetated hillside)\n",
@@ -580,14 +489,7 @@
    "cell_type": "code",
    "execution_count": null,
    "id": "final-map",
-   "metadata": {
-    "execution": {
-     "iopub.execute_input": "2026-03-13T02:48:21.493197Z",
-     "iopub.status.busy": "2026-03-13T02:48:21.493089Z",
-     "iopub.status.idle": "2026-03-13T02:48:22.232191Z",
-     "shell.execute_reply": "2026-03-13T02:48:22.231319Z"
-    }
-   },
+   "metadata": {},
    "outputs": [],
    "source": [
     "# Final composite: 10 m flood scenario\n",