### Encode and Decode WKB/EWKB with Geo

Source: https://hexdocs.pm/geo/v4.1.0/geo/readme

Illustrates encoding and decoding of Well-Known Binary (WKB) and Extended Well-Known Binary (EWKB) formats using the Geo.WKB module. Examples include handling points with and without SRID.

```elixir
iex(1)> {:ok, point} = Geo.WKB.decode("0101000000000000000000F03F000000000000F03F")
%Geo.Point{ coordinates: {1.0, 1.0}, srid: nil }

iex(2)> Geo.WKB.encode!(point)
"00000000013FF00000000000003FF0000000000000"

iex(3)> point = Geo.WKB.decode!("0101000020E61000009EFB613A637B4240CF2C0950D3735EC0")
%Geo.Point{ coordinates: {36.9639657, -121.8097725}, srid: 4326 }

iex(4)> Geo.WKB.encode!(point)
"0020000001000010E640427B633A61FB9EC05E73D350092CCF"
```

--------------------------------

### Encode and Decode WKT/EWKT with Geo

Source: https://hexdocs.pm/geo/v4.1.0/geo/readme

Demonstrates encoding and decoding of Well-Known Text (WKT) and Extended Well-Known Text (EWKT) formats using the Geo.WKT module. This includes handling points with and without SRID.

```elixir
iex(1)> {:ok, point} = Geo.WKT.decode("POINT(30 -90)")
%Geo.Point{ coordinates: {30, -90}, srid: nil}

iex(2)> Geo.WKT.encode!(point)
"POINT(30 -90)"

iex(3)> point = Geo.WKT.decode!("SRID=4326;POINT(30 -90)")
%Geo.Point{coordinates: {30, -90}, srid: 4326}
```

--------------------------------

### Add Geo Dependency to Elixir Project

Source: https://hexdocs.pm/geo/v4.1.0/geo/readme

This snippet shows how to add the Geo library as a dependency in an Elixir project's `mix.exs` file. Ensure you are using a compatible version of the Geo library.

```elixir
defp deps do
  [
    {:geo, "~> 4.0"}
  ]
end
```

--------------------------------

### Encode and Decode GeoJSON with Geo

Source: https://hexdocs.pm/geo/v4.1.0/geo/readme

Shows how to encode and decode GeoJSON representations of geometries using the Geo.JSON module. This process requires prior JSON encoding/decoding using a JSON library like `Jason`.

```elixir
# Examples using JSON as the JSON parser

iex(1)> Geo.JSON.encode(point)
{:ok, %{ "type" => "Point", "coordinates" => [100.0, 0.0] }}

iex(2)> point = JSON.decode!("{\"type\": \"Point\", \"coordinates\": [100.0, 0.0] }") |> Geo.JSON.decode
{:ok, %Geo.Point{coordinates: {100.0, 0.0}, srid: 4326, properties: %{}}

iex(3)> Geo.JSON.encode!(point) |> JSON.encode!
"{\"coordinates\":[100.0,0.0],\"type\":\"Point\"}"
```

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