مالفرق بين مهن ال Gis التالية ؟؟؟؟

ما الفرق بين مهام المهن التالية :
GIS Operater
GIS Specialest
GIS Analyst
GIS Officer

حيث أرى أنها متداخلة جدا

اليس هناك محترف واحد في هذا المنتدى يخبرنا عن مهام مهنته؟؟؟

أم أن الموضوع سر مهنة

وجدت هذا في أحد الإعلانات عن الوظائف :

اقتباس:

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The GIS Specialist’s responsibilities include:

Develop and design GIS analyses and reports for internal use by the Tree Planting, Communications, Education, Planning and Design, and Administrative program areas.
Generate maps and data analyses as required for external communications to volunteers, federal and local government agencies and other partner organizations.
Update and maintain all spatial databases for the organization (currently managed in SQL Express and ArcCatalog)
Prepare maps and dcidcidocumentation for tree inventories and organize collected data in ArcGIS
Work to expand the Department’s capacity to collect data via ArcGIS Mobile, Smartphones, tablet PCs and/or other electronic methods
Analyze and report on the environmental and economic benefits of trees

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الراتب فقط 40،000 دولار سنويا

وهذه متطلبات لوظيفة GIS Tichnican في إحدى الإعلانات : الراتب (عالساعة)

اقتباس:

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ESSENTIAL JOB FUNCTIONS:


Maintain the Smallworld GIS. Requires management of the 'Work Order' process initiated by Construction Services Representatives (CSRs) to insure that installed facilities are properly mapped and modeled in the Smallworld GIS (QA/QC).

Model electric facilities for real-time OMS prediction. It is critical that the GIS technician understands electric distribution systems and has the ability to create accurate digital representations of the real-world facilities. This includes management of facility connectivity in the GIS.

Assign unique identification numbers to electric facilities. It is essential that unique identifiers are assigned to facilities when installed to insure the safety of field crews.

Produce maps as required for tree-trimming, facility maintenance, facility renumbering, gas leak surveys, etc.

Collect GPS coordinates for facility as-builting and map accuracy maintenance.

Effectively communicate with staff at all levels regarding mapping products.

Check accuracy of mapping system via field verification.

Diagnose software/hardware compatibility issues related to mapping products.

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