Transcript Creation Of Digital Topographic Maps Of Industrial Area Based On Aerial Survey Tatyana Dedova KAZGEOCOSMOS JSC Almaty, Kazakhstan 2013, Ury, France Our clients KazMuniaGas National Company, JSC; KazMunaiGas EP,

Creation Of Digital Topographic
Maps Of Industrial Area Based On
Aerial Survey
Tatyana Dedova
KAZGEOCOSMOS JSC
Almaty, Kazakhstan
2013, Ury, France
1
Our clients
KazMuniaGas National Company, JSC;
KazMunaiGas EP, JSC;
Intergas Central Asia, JSC;
KATCO, JV LLP (AREVA and KAZATOMPROM);
Kazakhmys, PLC
Maersk Oil Kazakhstan GmbH;
Land Management Agency of Republic of Kazakhstan;
Forest Management Enterprise;
Local administrations of cities and regions of RoK;
Other companies.
2
Steps
 Geodetic control network survey
 Aerial survey
Photogrammetric processing
Field topographic reconnaissance
Digital mapping
3
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.
4
The network scheme
5
Aerial survey
6
Photogrammetric processing
•Photogrammetric block creating
•Rough orthomosaic creation for field
topographic reconnaissance
•Aerial triangulation
•DTM creation
•Orthomosaic creation
7
The break lines drawing
8
Field topographic reconnaissance
The 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.
9
Field topographic reconnaissance
10
Field topographic reconnaissance
11
Field topographic reconnaissance
12
Field topographic reconnaissance
13
Digital mapping
• Design and adjustment of GeoDataBase
14
The process of digital mapping
15
Slope indicators location
16
Quality check of digital map
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.
17
Digital mapping
18
Digital mapping
19
Digital mapping
20
Thank you for attention!
21