Tobin is your source for onshore well directional survey data covering Texas RRC Districts 2, 3 and 4, South Louisiana Parishes and Texas Barnett shale counties,with more areas to come. All survey points are captured and made available in ESRI formats, Oracle PPDM tables or ASCII fixed-field records. Tobin directional surveys have complete directional survey information starting with the primary values of measured depth, inclination and hole direction. The surveys are standardized to either true North or to the local projection. Tobin is the only onshore source of standardized survey data for mapping purposes.