A system and method for generating custom geospatial information maps and precision corrected images allows real-time interactive production of a desired output image by incorporating user selectable parameters that define various image synthesizing operations. A graphical user interface allows a user to specify parameters that define the desired output image via a remote computing device over a public access network such as the Internet. The parameters define image synthesizing operations such as area, projection, datum, fusion, masking, blending, mosaiking, resampling, and others. The desired output image is processed by an image assembly server according to the parameters and a variety of geospatial image data sources, and electronically delivered to a user via a public access network. The geospatial information may also be correlated with non-georeferenced data such that relevant associations between non-georeferenced data and the geospatial data are integrated in the output information product.