GELE case studies
GELE · Put your knowledge to work in context.
The Geodetic Engineer Licensure Examination (GELE) is the Philippine professional board examination that a candidate must pass before being registered as a licensed geodetic engineer and before lawfully signing and sealing survey plans, geodetic control descriptions, and related land and mapping documents. It is intended for graduates of a geodetic engineering program (or an equivalent qualification recognised by the Professional Regulation Commission) who are preparing to enter practice in government land agencies, private survey and consultancy firms, utilities, construction, mapping and GIS units, or their own practice. The GELE case studies are 5 cases and about 3,978 words.
1Ellipsoidal Heights, Geoid Undulation, and Grid-to-Ground Factor on a 1.8 km Line
A GNSS static campaign established two control points 1.846 km apart inside a UTM zone. Post-processed ellipsoidal heights are hA = 152.340 m and hB = 148.910 m.
695 words, about 3 min2Deed Distance Versus Found Monument with a Senior Adjoiner and a Long-Standing Fence
A retracement survey of Lot 7 follows a 1998 conveyance: from a concrete monument at the NE corner of Lot 6, thence S 45 deg 00 min E, 150.00 m to an iron pin; thence onward. The concrete monument is found intact and undisturbed in its original position.
840 words, about 4 min3A Failing Level Loop and a Weighted Mean from Observations of Unequal Precision
A 3.2 km closed level loop of 8 setups is run with a digital level; the misclosure is +0.024 m. The firm's specification permits a misclosure of 12 mm x sqrt(K), where K is the loop length in kilometres.
800 words, about 4 min4Digitizing Parcels from a 1:4,800 Scan and Other Scale-Accuracy Mismatches in a GIS Project
A municipal GIS team is digitizing parcel boundaries from a scanned subdivision plan compiled at 1:4,800. The raster was scanned at 400 dpi.
819 words, about 4 min5Flight Planning for a 10 km Block Against a Tight Planimetric Accuracy Requirement
An aerial survey is planned with a 23 cm x 23 cm frame camera, focal length 152.0 mm and 5.2 micrometre pixels. The aircraft will fly at 1,450 m above the project datum with 60% forward overlap and 30% sidelap.
824 words, about 4 min