Abstract: A method is taught for offering for purchase user selected earth imagery content in the form of a photo product. The method comprises the steps of receiving earth imagery metadata from a plurality of earth imagery content providers; overlaying the earth imagery metadata on a mapping application provided by a service provider that offers earth imagery content; a user communicating over a channel with the service provider, the user locating a geographical area via the mapping application and dynamically selecting via the on-line interactive man-machine interface a desired geospatial area represented by one or more user defined polygons; converting the user-selected geospatial area represented by one or more polygons to a data string; and transmitting the data string over a channel to a fulfillment provider, the fulfillment provider generating a photo product of the desired geospatial area in a format selected by the user.

Abstract: A test strip is provided for having liquid applied thereto and for determining the presence or quantity of an analyte in such liquid. Specifically, the test strip comprises a reaction zone which varies in reflectance as a function of the quantity of analtye present in the applied liquid. The strip is to be inserted into an optical reading apparatus. A standard zone is positioned on the strip so as to lead the reaction zone as the strip is inserted into the reading apparatus. The apparatus may then be provided with optical means for sequentially determining the reflectance value of the standard zone as the strip is being inserted into its fully inserted position in the apparatus and the reflectance value of the reaction zone after the strip has been inserted. The apparatus is further provided with means for calculating the presence and/or quantity of analyte in question as a function of the standard zone reflectance and the reaction zone reflectance.