Creation Of Digital Topographic Maps Of

Industrial Area Based On Aerial Survey

Tatyana Dedova KAZGEOCOSMOS JSC Almaty, Kazakhstan

2013, Ury, France

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Our clientsKazMuniaGas National Company, JSC;KazMunaiGas EP, JSC;Intergas Central Asia, JSC;KATCO, JV LLP (AREVA and KAZATOMPROM);Kazakhmys, PLCMaersk Oil Kazakhstan GmbH;Land Management Agency of Republic of

Kazakhstan;Forest Management Enterprise;Local administrations of cities and regions of

RoK;Other companies.

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Steps

Geodetic control network surveyAerial survey

Photogrammetric processingField topographic

reconnaissanceDigital mapping

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Geodetic control network survey

The following works usually are performed:•State Triangulation Network points are found and recognized in the field;•Ground Control points (GCP) and Check Points (CP) are installed and marked with crosses;•Geographical coordinates of both GCP and CP are measured using DGPS;•IIIth or IVth class leveling is performed for both GCPs and CPs implemented in the field.

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The network scheme

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Aerial survey

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Photogrammetric processing

•Photogrammetric block creating •Rough orthomosaic creation for field

topographic reconnaissance•Aerial triangulation •DTM creation•Orthomosaic creation

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The break lines drawing

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Field topographic reconnaissanceThe field objects interpretation and reconnaissance include:•information collection about infrastructure objects location and labeling,•making photo of industry infrastructure objects,•information collection about type of landscape, •sorting and preliminary processing of the collected material.

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Field topographic reconnaissance

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Field topographic reconnaissance

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Field topographic reconnaissance

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Field topographic reconnaissance

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Digital mapping• Design and adjustment of GeoDataBase

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The process of digital mapping

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Slope indicators location

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The quality checking includes:

•Checking the conformity, completeness and adequacy of digital data to initial raster orthophoto with all the errors recorded into a file of comments.•Checking the conformity of semantic data in attributive tables to the field reconnaissance data.•Loading together the map sheets on borders. Checking the conformity of the objects for southern and eastern part of the map sheets.•Checking for presence of objects with missing classification codes.•Checking inconsistency and typing errors in the attributive data.•Checking the correctness of geometric topology by standard topology fixing tools for revealing various irrational errors.In the progress of quality checking all separate lines of the same character that were created in different sectors of the map by varying cartographers are merged into one object according to attribute domains code.

Quality check of digital map

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Digital mapping

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Digital mapping

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Digital mapping

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Thank you for attention!

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