FAQ - GIS digitizing

now so easy!!

Find answers to frequently asked questions about the JDS GIS digitization.

We have geographical maps from
our area and want to convert these into a digital map.

 
JJDS scans these maps, does the georeferencing by using reference points and fits them together to a seamless total map in the coordinatesystem respectively the map projection (UTM, Gauss-Krüger) required. The map can be exported to most GIS systems like Autodesk Map, ArcGIS, MapInfo, Berit LIDS, GE Smallworld. We do precise conversion of the map content into vectordata and extraction and positioning of the different objects onto the appropriate layers.

To the graphical elements in our
map we want to add additional data relevant to the the objects in the map.

 
JDS can enter this data directly into several GIS systems, like Autodesk Map and ArcGIS. Contact us about your GIS system. Also we can enter existing legacy data into database tables in Oracle, SQL oder Access. From these tables the data can be imported into your GIS system.

We have arial photographs from which new maps shall be derived. Alternatively the existing map shall be completed and brought up-to-date on the basis of these arial photographs.

 
JDS does the orthorectification in order to remove geometric and other distortions. The images are transformed into a coordinate system, using reference points and merged into seamless overall map that is updated by comparing the existing map.

We are a utility company and have several hundred maps on paper or transparent sheets describing the area that we supply with energy and our network consisting of cables and pipes. The existing maps include many colored and frequently revised entries. We would like to extract from these paper maps all objects from our supply network and blend them into the digital land base map. All operational lines, pipes and equipment needs to be digitized while a set of rules must be followed, like for instance a predefined positioning of the cable route within the street boundaries. As a result we want to get e.g. a CAD file containing an electrically interconnected cable route of our complete supply area, which we can import into our GIS system and connect this graphic data with other object data stored in the GIS data base. For the combined digital representation of our supply network with the landbase map the Gauss Krüger coordinate system has to be used.

 
At JDS we scan the maps in color and do the georeferencing by using reference points. Subsequently we extract cable and pipe routes as coherent vectors, as well as transformers, switches and other operational equipment. All elements are placed on the appropriate layers as specified by the customer. The location of the digitized e.g. cable routes and objects are matched with the digital land base map. From this digitization process results a CAD file containing an interconnected representation of the energy network. The data format for the CAD file is dwg, dgn or dxf and can easily be imported into all common GIS systems. If required we can supply the data also directly in the native formats of many GIS system.

We operate a transportation network work and do maintain many thousand green areas, which are located along our transportation network. Today these green areas are present on colored map sheets. For improved maintenance these green areas shall be administrated by a GIS. Therefore the green areas shall be digitized as polygons in a CAD file that can be imported into the GIS. Further the GIS shall be updated by object data, which today is contained partially in lists, partially in a data base.

 
At JDS we scan and do the georeferencing of the map sheets and match these with the digital land base map, as well as with a possibly existing digital representation of the transportation network. From the georeferenced maps we digitize the green areas as polygons, index these and prepare the merging with the object data in the GIS system.

The land utilization plan of our municipality is presently available as a colored map on paper. It needs to be transferred into digital form. Traffic routes, vegetation surfaces, power supply lines and pipes shall be captured as digital objects.

 
At JDS we scan and do the georeferencing of the colored land utilization map and match it with the digital land base map if available. We provide polygons and shadings for the presentation of different land use areas and place these according to the municipalities specification on separate layers. All other elements (like e.g. power supply lines and pipes) are provided accordingly also on different layers.

The communal development plan of our municipality is presently available on paper. It needs to be transferred into digital form.

 
At JDS we scan and do the georeferencing of the communal development plan and match it with the digital land base map if available. We provide polygons and shadings for the presentation of different land use areas.

Can JDS transfer map material, which is represented today in old coordinate systems, e.g. in Soldner coordinates into the widely used Gauss Krüger coordinate system?

 
Yes, we already have accomplished projects where the initial material was in Soldner coordinates and which we have transformed into Gauss Krüger.

What are the differences between CAD and GIS and what do they have in common?

 
CAD (Computer Aided Design) is used predominantly for the engineering type production of drawings. The main issue here is to provide a wide variety of geometrical functions with very high accuracy. These functions support engineers, designers and architects in the design of machines, plants and buildings.
GIS systems (geographical information systems) administer in connection with the geographical map equipment such as cables, pipes, rails and so on and the data related to these objects, like power specifications, maintenance data, etc.. The emphasis with GIS thus is on the administration of matching objects and data, while the accuracy and the constructional aspect are less important.
Historically GIS systems because of the need to store object data have been integrated with data bases prior to CAD systems. Although today also all important CAD systems feature an integrated data base. An important aspect with GIS systems is the generation of relations between objects and the map and the referencing of the plan to existing points of reference and coordinate systems. This topic of georeferencing and the transformation requires special functions in GIS systems.
Ever more operators of technical plants must both handle constructional and/or technical maintenance and engineering tasks, and at the same time need information about the location of the equipment with reference to the geographical map in their plants or networks, including equipment related data and specifications. Therefore CAD and GIS systems must be able to exchange data in both directions, whereby neither the accuracy nor the reference of the objects may be lost.

More FAQ:

FAQ – CAD digitizing
FAQ – FM survey & drawings
FAQ – SCAN services
FAQ – OCR services

Test us!

See the quality of our service for yourself in advance: We create a test scan / CAD file.
FREE of charge & without any obligation!

Send us a section of your plan for a test digitization by mail, email or use our fast and convenient uploader!!

Logo_IngBueroStephan

“The results of the JDS CAD digitization really convinced us!

We would already have saved a lot of time and money had we known of JDS SOMMER GmbH earlier. We can recommend JDS CAD digitization to all CAD users who desire nearly completely exact and complete conversions of existing plans and details into CAD files for very favourable prices!”

- Engineering Bureau Martin Stephan

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+49 (0)69 / 905 469-0 or send us an email with your inquiry.

We advise you gladly and will make an individual offer free of charge taking the amount of your templates under consideration.

Read in references about projects realized in practice and how companies like yours gained significant competitive edge at low cost and in a short time by using our services.