1. A computer implemented method for accommodating a fractional level of detail (LOD) image data request using image data indexed at integer LOD steps, comprising: (a) receiving, from a client, a request for image data at a fractional LOD value, wherein the fractional LOD value is not an integer, and wherein the requested image data is indexed at integer LOD steps; (b) obtaining a set of features associated with the requested image data at a range of LOD values between a first integer endpoint LOD value and a second integer endpoint LOD value, wherein the fractional LOD value is between the first endpoint LOD value and the second endpoint LOD value; (c) assigning the fractional LOD value to the obtained features; and (d) providing the features and the image data at the fractional LOD value to the client, wherein at least one of steps (a)-(d) is implemented on one or more processors.