Geocoding

geospatial

map

geocoding

Transforming address to a coordinate

Introduction

Geocoding is the process of transforming a description of a location—such as a pair of coordinates, an address, or a name of a place—to a location on the earth's surface. You can geocode by entering one location description at a time or by providing many of them at once in a table. The resulting locations are output as geographic features with attributes, which can be used for mapping or spatial analysis.

You can quickly find various kinds of locations through geocoding. The types of locations that you can search for include points of interest or names from a gazetteer, like mountains, bridges, and stores; coordinates based on latitude and longitude or other reference systems, and addresses, which can come in a variety of styles and formats, including street intersections, house numbers with street names, and postal codes.

Dataset

Load dataset

We’ll be working with the Zomato - India Restaurant dataset, which includes various details about restaurants. For this analysis, we’ll focus on the Locality parameter, which provides the addresses of restaurants across India. This will serve as the key element in mapping and analyzing restaurant locations.

data = pd.read_csv(r'..\map\zomato.csv',encoding="ISO-8859-1")
df = data[['Locality']]

Get the coordinate for each locations

There are several method to get the coordinate for each locations by using geocoding. The simple and common method such as :

• Openstreetmap.org (OSM) is a digital map database of the world built through crowdsourced volunteered geographic information (VGI). it is means free but not accurate. You can read usage policy OSM here.

• Google Maps Platform is a web mapping platform and consumer application offered by Google. We need billing to access their API. It is means reliable but costly.

For this project we can use OSM method, for example to see how good our result is.

The Code

By calling maps.spatial_interpolation, we can weather stations reporting data for January 1, 2022 across Ohio, and calculate interpolation for area around them.

result = maps.geocoding(main_data, col_address, source='osm', key='your_API_key')

This function requires the following parameters:

• main_data (string): Data location and value
• col_name (string): Targated column in main_data
• source (string): [osm, oc, osm_v2, google], Type of geocoding source that we want to use.
• key (string): key ID specific for google API

The result

OSM

Google API

OpenCage Geocoding API

What can geocoding be used for?

From simple data analysis to business and customer management to distribution techniques, there is a wide range of applications for which geocoding can be used. With geocoded addresses, you can spatially display the address locations and recognize patterns within the information. This can be done by simply looking at the information or using some of the analysis tools available with ArcGIS. You can also display your address information based on certain parameters, allowing you to further analyze the information. A few of these applications are described in the sections that follow.

• Address data analysis - With geocoded addresses, you can spatially display the address locations and begin to recognize patterns within the information.

• Customer data management - Geocoding acts as a crucial part of customer data management. Nearly every organization maintains address information for each customer or client. This is usually in tabular format, containing the customer name, address, buying habits, and any other information you have collected. Geocoding allows you to take your customers’ information and create a map of their locations. Using a variety of related applications, you can use this information in many ways, from establishing marketing strategies to targeting specific clusters of customers to producing route maps and directions. The geocoded locations of your customers can be invaluable data.

reference

• https://desktop.arcgis.com/en/arcmap/latest/manage-data/geocoding/what-is-geocoding.htm