writing doc

README.md

@@ -2,4 +2,22 @@
 A Geospatial Application
 
 # Documentation
-  Working on it ...
+
+    - So, you interested in building a mapping application ?
+    - Yes
+    - Okay, I'm gonna take you through each and every step. All you need to do is to follow me.
+    - You ready ?
+    - Definitely
+
+## Initial SetUp
+    First thing first, you need world map data ( here we'll be using shapefiles ) to build a map of world. We'll use [GADM](https://gadm.org) as map data source. Here is the [data](https://biogeo.ucdavis.edu/data/gadm3.6/gadm36_levels_shp.zip), which we'll require.
+
+    So I've written small bash script for you to download and unzip that data.
+
+    ```bash
+    #!/usr/bin/bash
+    # script downloads shape files from GADM, make sure you're connected to internet
+    wget https://biogeo.ucdavis.edu/data/gadm3.6/gadm36_levels_shp.zip
+    # unzips downloaded zip into multiple layered shape files, which will be later on used for inflating features into database
+    unzip gadm36_levels_shp.zip
+    ```