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Digital maps in standard or usual occurred format
2002 (English)Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

The purpose of this Maser of Science Thesis is to make an investigation of map-formats and find information about: • Overarching mapping of today’s usually occurred/standardized map-formats • More thorough details of the most interesting map-formats (3-6) with reference of: • Spreading (geographic as well as business related and within governments/authorities of interest). • Function that the map-format gives. • Map import possibilities to Erisoft´s own application (with reference of informationstructure and software library). The results of this work will be a foundation for decisions about what map-format shall be used in Ericsson’s different command and control system (c2 system). I spent my first weeks searching for information about different map-formats and standards and I came across a few. After discussing with my supervisor we decided which ones I was supposed to describe more thorough. These were Shape, GML and S57. Shape since it is a commercial mapformat, GML because it is a coming de facto standard and S57 as it is a standard for marina use. The other formats and standards are mentioned and a little description is given. I found one converting tool as well, which I also will discuss. • Shape – it was unfortunately hard to find out exactly what governments/authorities around the world that are using the Shape format. Looking at their website one can read about where ESRI has whole sellers and that is in every continent and almost every country. Shapefiles supports point, line and area features. A Shapefile consists of a main file, an index file and a dBase table. The main file is direct access, variable recorded- length file in which each record describes a Shape with a list of its vertices. Each record, in the index file, contains the offset of the corresponding main file record from the beginning of the main file. The dBase table contains feature attributes with one record per feature. The one-to-one relationship between geometry and attributes is based on record number. Attribute records in the dBase file must be in the same order as records in the main file. They have edit ability because they do not have the processing overhead of a topological data structure and they require less disk space, which makes it easier to read and write them. The reason to why Shape will be recommended is because Shapefiles can be either ASCII or binary formats and uses both 21/2 and 3D geometry. MID/MIF and Arc/Info Ungenerated can not be binary format. Arc/Info Ungenerated and DXF use only 2D geometry. That is a few advantages that Shape has against other formats. ESRI is a well-known name in the GIS world and I believe that you won’t regret if you invest in an ESRI product such as ArcView (which uses the Shape-format).

Place, publisher, year, edition, pages
2002.
Keyword [en]
Social Behaviour Law, Mapformats, standards
Keyword [sv]
Samhälls-, beteendevetenskap, juridik
Identifiers
URN: urn:nbn:se:ltu:diva-46331ISRN: LTU-DUPP--02/17--SELocal ID: 3f7acd48-2575-4d9f-b7ee-e3fc4573e837OAI: oai:DiVA.org:ltu-46331DiVA: diva2:1019645
Subject / course
Student thesis, at least 15 credits
Educational program
Geographical IT, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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