Task 2 of the Atlas of Major Appalachian Basin Gas Plays a is the data collection and compilation phase of the project. The prime objective is to collect information by pool, i.e., producing reservoir within a field, that will provide (1) basic reservoir data, (2) reservoir parameters, (3) fluid and gas properties, and (4) volumetric data. It is imperative that all data elements be well understood by all participants to facilitate this process. This report presents an overview of data collection topics. Three families of data that be part of this project: (1) the data base of pool information, (2) drawings, charts, and maps, and (3) text data, including bibliographic information. An initial data definition will be presented with an emphasis on the data base of basic information by pool. Because of the direct bearing on Task 2 of the project and the development of a data base as a deliverable product, this report will concentrate mainly on data definition and collection. A basic data collection strategy is included.