Calculate mapmaking information from field notes, and draw and verify accuracy of topographical maps.

• Aerial-Photograph Interpreter
• Editor, Map
• Geodetic Computator
• Mosaicist
• Photogrammetric Technician
• Stereo-Plotter Operator
• Supervisor, Mapping

• Analyze aerial photographs to detect and interpret significant military, industrial, resource, or topographical data.
• Answer questions and provide information to the public and to staff members regarding assessment maps, surveys, boundaries, easements, property ownership, roads, zoning, and similar matters.
• Calculate latitudes, longitudes, angles, areas, and other information for mapmaking, using survey field notes and reference tables.
• Check all layers of maps to ensure accuracy, identifying and marking errors and making corrections.
• Compare topographical features and contour lines with images from aerial photographs, old maps, and other reference materials to verify the accuracy of their identification.
• Complete detailed source and method notes detailing the location of routine and complex land parcels.
• Compute and measure scaled distances between reference points to establish relative positions of adjoining prints and enable the creation of photographic mosaics.
• Create survey description pages and historical records related to the mapping activities and specifications of section plats.
• Determine scales, line sizes, and colors to be used for hard copies of computerized maps, using plotters.
• Enter Global Positioning System (GPS) data, legal deeds, field notes, and land survey reports into geographic information system (GIS) workstations so that information can be transformed into graphic land descriptions, such as maps and drawings.
• Form three-dimensional images of aerial photographs taken from different locations, using mathematical techniques and plotting instruments.
• Identify and compile database information to create maps in response to requests.
• Identify, research, and resolve anomalies in legal land descriptions, referring issues to title and survey experts as appropriate.
• Lay out and match aerial photographs in sequences in which they were taken, and identify any areas missing from photographs.
• Monitor mapping work and the updating of maps to ensure accuracy, the inclusion of new or changed information, and compliance with rules and regulations.
• Produce and update overlay maps to show information boundaries, water locations, and topographic features on various base maps and at different scales.
• Produce presentations of surface and mineral ownership layers by interpreting legal survey plans.
• Redraw and correct maps, such as revising parcel maps, to reflect tax code area changes, using information from official records and surveys.
• Research and combine existing property information to describe property boundaries in relation to adjacent properties, taking into account parcel splits, combinations, and land boundary adjustments.
• Research resources such as survey maps and legal descriptions to verify property lines and to obtain information needed for mapping.
• Supervise and coordinate activities of workers engaged in plotting data, drafting maps, or producing blueprints, photostats, and photographs.
• Trace contours and topographic details to generate maps that denote specific land and property locations and geographic attributes.
• Train staff members in duties such as tax mapping, the use of computerized mapping equipment, and the interpretation of source documents.
• Trim, align, and join prints to form photographic mosaics, maintaining scaled distances between reference points.

• analyze spatial data
• analyze technical data, designs, or preliminary specifications
• communicate technical information
• develop or maintain databases
• direct and coordinate activities of workers or staff
• draw maps or charts
• draw prototypes, plans, or maps to scale
• interpret aerial photographs
• read maps
• read technical drawings
• research property records
• use computer aided drafting or design software for design, drafting, modeling, or other engineering tasks
• use computer graphics design software
• use computers to enter, access or retrieve data
• use drafting or mechanical drawing techniques
• use field notes in technical drawings
• use geographical information system (GIS) software
• use spreadsheet software