Table 3.
Performance metrics for the downloading function, MODISSubsets, all times reported in seconds. The times reported here are for a simple subset request (one site, focal pixel only, for 1 year) using an example data.frame provided with MODISTools called SubsetExample. The effect of time-series length (3 years), tile size (2.25 × 2.25 km tile size – 81 pixels), and number of sites (four sites, using the MODISTools data.frame EndCoordinatesExample) on time taken to download is shown for multiple computers. The largest source of variation in download times will be traffic at the ORNL DAAC MODIS server, and internet connection
| System | Simple request | Time-series length | Tile size | Number of sites |
|---|---|---|---|---|
| MacBook Air (2013) | 51.962 | 119.687 | 32.177 | 173.033 |
| Processor: 1.3 GHz Intel Core i5 | ||||
| Memory: 8 GB 1600 MHz DDR3 | ||||
| Software: OSX 10.9.4 | ||||
| Internet: up to 30 MB wireless | ||||
| MacBook Pro | 36.887 | 99.253 | 37.093 | 148.616 |
| Processor: 2.4 GHz Intel Core 2 Duo | ||||
| Memory: 4 GB 1067 MHz DDR3 | ||||
| Software: OSX 10.6.8 | ||||
| Internet: up to 90 MB wireless | ||||
| MacBook Mini | 47.387 | 112.134 | 39.210 | 158.606 |
| Processor: 2.6 GHz Intel Core i7 | ||||
| Memory: 16 GB 1600 MHz DDR3 | ||||
| Software: OSX 10.8.5 | ||||
| Internet: Network cable |