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GIS Mapping Technician

Company name
Mason, Bruce & Girard

Mcclellan, CA

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Job Details

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Mason, Bruce & Girard


Natural Resource Consultants

GIS Mapping Technician– McClellan, CA

About the Position

This position will include image interpretation and map editing of existing vegetation maps. This position will work on-site at the US Forest Service

Region 5 Remote Sensing Lab in McClellan, CA

The GIS Mapping Technician will perform the following tasks:

Manual editing of feature classes to improve the spatial and attribute accuracy of ancillary layers that are incorporated into the image segmentation process.

Assist with pre-planning for field data collection and qualitatively assessing errors in datasets used for modeling, requiring extensive knowledge of vegetation types and ranges within California’s bioregions.

Coordination among the team members to assure timely delivery of existing vegetation products. Coordination with the FS program manager and the designated project lead to assure distribution and flow of work.

Quality assurance and quality control of mapping products shall be conducted at several stages of the mapping process. Manual image interpretation shall be needed to augment training and validation sample sizes of field collected data that are used for assessing model outputs and conducting an accuracy assessment of classification outputs of remotely sensed data.

Attribution of polygons with regional dominance type, percent cover from above, and tree size class for use as training sites in the classification of imagery is another requirement of the project. The extensive use of multi-source imagery, from spaceborne and airborne platforms, for the interpretation and identification of vegetation dominance types and structural attributes comprises the majority of the SOW duties for this level of support.

Use of existing ancillary data sets and accuracy assessments to assist in the streamlining and development of vegetation map products is vital to making improvements to revisited (map updates) project areas.

Knowledge of an object-based image processing package. The user will create or modify scripts based on the mapping area needs.

Gathering image-to-image tie points or field collected coordinates

Additional project work may be assigned due to changing Regional priorities.

Fieldwork and data collection requirements

Occasional fieldwork is required to check the accuracy of the vegetation maps or collect field measurements to support vegetation type and structural mapping projects.

Field work shall include navigation to preselected plots using GPS, collection of vegetation data, including environmental variables, site history, disturbances, and CALVEG type. Intermediate to expert-level knowledge of the distribution and identification of CALVEG dominance types is essential for accurate data collection and QA/QC. Additionally, constructing bioregion-specific data dictionaries for data collection devices is required for field data collection.

Post processing of locational data with GPS software and data post-processing is required after field data collection has occurred in order to produce a database that can be used for mapping projects. The field collected data shall be imported into an ESRI feature class template and archived in the data library for use in vegetation mapping projects.

About You

To excel in the Natural Resource GIS Analyst/Programmer position, you should possess the following skills, experience, and background:

Bachelor’s degree in Geology, Geography, or Earth Science.

Coursework and work-related experience pertaining to forestry, ecology or natural resource management, as well as extensive experience with photo/image interpretation and plant species identification is required.

Familiarity with multiple vegetation classification systems, including CALVEG, California Wildlife Habitat Relationships, Manual of California Vegetation, and the National Vegetation Classification.

Experience using a Riegel (model VZ-400i) terrestrial LiDAR scanner for field data collection using a predetermined sampling and plot design.

About Us

Mason, Bruce & Girard, Inc. is a full-service natural resource consulting firm, with expertise in environmental services, forestry, and geographic information systems (GIS). A set of core values guide our work, focusing our efforts on providing responsible, sustainable solutions that meet client needs.

Our areas of expertise include forestry, wildlife, fisheries, wetlands, water quality, and GIS. Our work is characterized by the highest level of client service, the application of the best science and technology, quality processes and results, integrity, and our respect for the natural environment. We provide natural resource consulting services to both industry and government and have done so since 1921.

Join Us/Apply Now

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or visit the Careers section of our website to send us your resume.

Mason, Bruce & Girard is an equal opportunity, affirmative action employer, and we do not discriminate against employees or job applicants on the basis of race, color, national origin, age, religion, gender, gender identity, disability, sexual orientation, veteran status, or any other status or consideration protected by local, state and federal laws, except where a bona fide occupational qualification applies.

Equal opportunity applies to hiring, promotion, training, compensation, and any other organizational action. MB&G’s written Affirmative Action Plan is available to all employees and job applicants upon request.

MB&G is proud to be an equal opportunity employer.

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