Updated ArcGIS installation instructions (#68)

Author: p-vdp

docs/examples/arcgis.ipynb

@@ -14,14 +14,25 @@
     "## Steps to install segment-geospatial\n",
     "\n",
     "1. Open Windows Registry Editor (`regedit.exe`) and navigate to `Computer\\HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\FileSystem`. Change the value of `LongPathsEnabled` to `1`. See [this screenshot](https://user-images.githubusercontent.com/46331011/225140182-df32dcfe-dca2-4e7f-9992-4c389af36184.png). This is a [known issue](https://github.com/Esri/deep-learning-frameworks/blob/master/README.md#known-issues) with the deep learning libraries for ArcGIS Pro. A future release might fix this issue.\n",
-    "2. Download the [Deep Learning Libraries Installer for ArcGIS Pro 3.1](https://github.com/Esri/deep-learning-frameworks/blob/master/README.md#download). Unzip the file and run `ProDeepLearning.msi` to install the libraries.\n",
-    "3. Open ArcGIS Pro and navigate to **Package Manager**. Clone the `arcgispro-py3` environment and name it `segment` or any other name you prefer. Activate the cloned environment.\n",
-    "4. Navigate to Start menu - ArcGIS - Python Command Prompt - Right Click - More - Run as administrator.\n",
-    "5. Run `conda activate base` to activate the base environment.\n",
-    "6. Run `conda install mamba -n base -c conda-forge` to install mamba in the base environment.\n",
-    "7. Run `conda activate segment` to activate the cloned environment.\n",
-    "8. Run `mamba install -c conda-forge leafmap localtileserver segment-geospatial` to install the required package dependencies in the cloned environment.\n",
-    "9. Download this notebook and run it in ArcGIS Pro."
+    "2. Navigate to Start Menu -> All apps -> ArcGIS folder, then run the Python Command Prompt\n",
+    "3. Create an new environment with mamba (for MUCH faster installation) and Python 3.9.x\n",
+    "\n",
+    "`conda create conda-forge::mamba esri::python --name samgeo`\n",
+    "\n",
+    "4. Activate the environment\n",
+    "\n",
+    "`conda activate samgeo`\n",
+    "\n",
+    "5. Install arcpy, segment-geospatial, and dependencies (~4GB download)\n",
+    "\n",
+    "`mamba install arcpy deep-learning-essentials leafmap localtileserver segment-geospatial -c esri -c conda-forge`\n",
+    "\n",
+    "6. Activate the new environment in ArcGIS Pro\n",
+    "\n",
+    "`proswap samgeo`\n",
+    "\n",
+    "7. Close the Python Command Prompt and open ArcGIS Pro\n",
+    "8. Download this notebook and run it in ArcGIS Pro"
    ]
   },
   {