# Aggregation Methods for Data Modeling

In the Data Modeling Load Nodes, regridding methods need to be selected if the data is going to be geographically and/or temporally regridded. This is the list of options available in both the Geo and Time Aggregation dropdowns:

`conserve`

- maintain the total sum of the data before and after (e.g. for regridding population)`min`

- take the minimum value from each bucket during regridding`max`

- take the maximum value from each bucket during regridding`mean`

- take the mean value from each bucket during regridding.*Note: Use interp_or_mean instead of*`mean`

, since it doesn't handle well when increasing the resolution of the data`median`

- take the median value from each bucket during regridding`mode`

- take the mode of each bucket during regridding.*Note: Use nearest_or_mode instead of*`mode`

, since it doesn't handle well when increasing the resolution of the data`interp_or_mean`

- if increasing resolution, interpolate the data. If decreasing resolution, take the mean of each bucket`nearest_or_mode`

- if increasing resolution, take the nearest data. if decreasing resolution, take the mode of each bucket