Planning a Survey 4

Jobsite Investigation: To carry out a survey with the DS4000 in the most efficient way, gather all available information before each project 

• Make yourself familiar with the jobsite features.
• Obtain technical maps, recommended in DXF format, about existing utilities on the jobsite.
• Supplement the acquired scan data by opening manholes on-site.
☞ Be cautious when performing site investigation and make sure to adhere to local laws for safety.

 Jobsite Features: The basic requirement for carrying out a survey is understanding the features of the jobsite. When gathering information about the jobsite, keep in mind
the objectives of the survey. Consider the following points when preparing the survey

• Do you need any specific permissions to carry out the survey on the jobsite, for example, access permission to pedestrian zones or permission to interrupt the traffic flow?
• Are there any difficulties in accessing the jobsite? (Available space, any architectural features forming an obstacle, etc.).
• Is the jobsite in an area with a high level of urban traffic, such as streets, squares or pavements? Are there parked cars that could be in the way during the survey?

Technical Maps of existing utilities: Technical maps of existing utilities are normally created by public utility companies. Such maps give a schematic overview about the type and position of utilities that are constructed and managed by the public utility companies.
Even if these maps are generic, they can give a first impression of the existing utilities and provide additional information during the data acquisition and interpretation phase.

☞ To obtain technical maps of the jobsite, contact the cartographic or planning office of the different utility companies. Clearly specify the streets and areas of interest. Request the maps early enough in advance to the survey, to ensure that the maps are available for the data acquisition phase.

The following list contains the most important types of utilities that need to be considered:
• Street lights
• Low, medium and high-voltage electricity cables
• Telephone cables
• Gas pipes
• Water supply pipes
• Sewage pipes

Opening manholes

Once data acquisition is complete, opening the manholes on-site can provide you with further information regarding depth, diameter and direction of the utility. This information serves as reference data during the interpretation phase.