Fix pandas data type interpretation

[alexkcode]

For certain fields the data type is being interpreted as something undesirable before being converted, changing the data institutionally. For example, this happens with 'Latitude', 'Longitude', which gets truncated as a float type before it gets converted to a string type. This could be happening with other columns as well, but only those two columns are confirmed. We should give the pandas read_csv method fixed data types (at least for the columns we care about and have fixed type information for) to read the data.