Geographical Information Systems

NoSQL Geographic Databases: An Overview 93

To import data into MongoDB, the import tool (mongoimport) can be

used as shown in Fig. 10. The -d option indicates the database in which

data will be imported, in our example, gisdb. The -c option specifi es the

data collection and the last parameter is the fi le input (pois.json).

Then, the indexes can be created to allow spatial queries, as illustrated

in Fig. 11.

The following algorithms were written using the JavaScript API for

the MongoDB shell. The algorithms assume that the data were imported

into the “gisdb” database, the corresponding items were created, and the

connection to the database was ...