AvisMap GIS is a comprehensive geographic information system developed by AvisMap GIS Technologies with the technology innovations. It can address the need of different kinds of users. AvisMap GIS 5 is a new generation GIS platform. Based on advanced technologies, openly cooperation and excellent service, AvisMap GIS family has been applied in many fields in many countries and regions such as Japan, Korea, Italy, USA, Taiwan (province of China), Hong Kong, Macao, etc. AvisMap GIS is fast becoming an international GIS brand.

Based on new concepts and open technology, AvisMap focuses on research and development of a basic GIS software platform, and provides a development platform and data processing tools for application development in different fields. Additionally, AvisMap fully supports development of GIS application software and systems to open GIS markets in cooperation with companies in different fields.

Adhering to GIS spirit specializing in services, AvisMap proceeds from the users and developers to offer them an open software environment for industry and build their own GIS applications. Users not only can set up their own application system conveniently, but also develop the professional software products with independent copyright on the basis of AvisMap GIS for wider application space.

AvisMap GIS is a complete suite of products for various kinds of the application requirements. AvisMap GIS offers the functions of spatial data management, data acquisition, data processing, comprehensive application system development, geographical spatial information dissemination and omni-directional products of mobile/embedded application development, which contains the entire course of GIS applied engineering construction. AvisMap GIS 5 includes:

• AvisMap GIS Engine

  Component GIS development platform for professional application system development.

• AvisMap GIS Desktop

  Professional desktop GIS software for geographic spatial data processing, analysis and modeling.

• AvisMap SDM

  Spatial database engine Extension for mass spatial data management.

With regard to design of AvisMap GIS, the standardization is focused. Generally, the technical characteristics of AvisMap GIS are presented below;

• Component GIS development platform for professional application system development.

• It has a similar data model. All the products of AvisMap GIS running on a PC use thesame data format which can be directly used without any other processing and information loss. For using embedded products, only a simple conversion is required,which efficiently avoids information loss and extra workload caused by difference in data formats.

• AvisMap GIS family software has unified map resource configuration. The maps created by AvisMap Desktop can be used directly in AvisMap Objects without any conversion and processing. The maps in desktop products and development platform can be published directly in AvisMap IS.NET without any processing.

• Spatial Index Technique

Mass data management is an important technical for new generation GIS platform. It is an important sign whether GIS software can be used for a large-scale project. Fast index spatial data is one of the key techniques for implementing mass data management. AvisMap GIS develops multiple hybrids index technique based on quad tree, R tree and grid. It overrides the shortage of traditional single index technique and establishes a firm foundation for mass spatial data management.

• Spatial Database Extension

SDM (Spatial Database Extension) is a spatial database engine in AvisMap GIS. SDM +5 is the new upgrade of SDM which uses new data structure and index techniques for improving vast data management ability. Its combination property is higher than other international homogeneous software. The technique of AvisMap SDM/SDM +5 successfully replaces the other international software in many large-scale GIS application and is becoming widely used.

The spatial database engine in AvisMap GIS 5 includes: SDM+ 5 for SQL Server, SDM+ 5 for Oracle, SDM + 5 for Sybase, SDM + 5 for DM3, etc.

• SIT-- External Image File

SIT (AvisMap Image Tower)-- is a new external image file added to AvisMap GIS 5 whose characteristics are:

Independent on the third party's plug-in board without any extra expense;

Store image data into independent file for directly use in different soft hardware system;

In theory the file can be up to 264 byte when its size exceeds 2GB limitation of Windows operation system;

Cross Operation System: the visit and store format of this file independent on the operation systems and can be directly use in Windows operation system, Unix, Linux and otheroperation systems;

Cross Hardware: the system hardware has been considered when designing SIT file which is independent of any particular hardware and can be used either on PC, or PDA,Mobile and other embedded equipment;

Optional data compression: SIT file support many compression mode including non-compression, non-destructive compression and destructive compression to address more application need;

High data compression which can reach 10 to 20 times. It saves disk space and improves access efficiency;

Automatically builds and stores image pyramid to rapidly display mass image data whose speed can compare favorable with ECW and MrSID.

• Image Data Management

AvisMap SDM/SDM +5 has the function of storing mass image into large-scale relational databases and select destructive/non-destructive compression for different need. In image database, SDM/SDM +5 will build image pyramid to avoid plenty of mass loss in wavelet image compression. It reaches the target of mass image data organizational management and rapidly browse effect independent of data volume.

In addition, AvisMap GIS is still developing integrated MrSID and ECW image compression format for management image data.

The graphics edit function in traditional GIS is weaker than CAD. The system construction using by GIS needs to adopt CAD software to process spatial data acquisition, data management and update. AvisMap GIS overcomes the traditional GIS limitation of map edit. With the powerful map editor function, database creation, data management, updating and development can be directly used in AvisMap GIS, which decreases cost and avoids data loss or other problems.

• Data Security in Spatial Database

AvisMap GIS spatial database technique adopts relational database to store spatial data where the administrator can define an account, password and authority for each client on the server. The client only can access/use spatial data within the authority and must obey the rules without initial data. It solves the fundamental data security problem of data access mode in traditional GIS.

• File Format Data Security

In order to fully protect your intellectual property, AvisMap GIS shows its originality in cryptoguard for file format (SDB/SDB 5).

• Image Data Security

AvisMap GIS stores image data into spatial database and SDB/SDB 5 files and process security protection by using the database and file security technique described above. The other is by using cryptoguard in MrSID image data compression; the cryptographic MrSID data can be used in AvisMap GIS, too.

• Convenient Symbol Creation and Management Tool

AvisMap GIS has a powerful function of spatial information visualization, including defaults point, line, and symbol filling, and inner embedding point, line and filling editor tools for customize any symbols.

• Display Map Artistic

Map display effect is another important aspect in GIS software. AvisMap GIS has multiple controls for improving map display effect.

• Thematic Maps

There are abundant thematic maps in AvisMap GIS, which can display and express most attribute information of spatial objects. It is an ideal visualization analysis tools, including unique value thematic maps, range thematic maps, graduated symbols thematic maps, graph maps, dot density thematic maps, label thematic maps, and other customize thematic maps, where graph maps include curve diagram, area graph, gradient graph, histogram, 3D column graph, pie chart, 3D pie chart, rose graph, 3D rose graph, stacked graph, 3D stacked graph, etc.

AvisMap Objects 5 has many controls and decorations for thematic maps:

Label thematic maps offer label offset, float text, annotation along the line and label rotation;

Histograms permit adjusting width and original angle of chart fan;

All thematic maps control display scale in maximum and minimum display;

Export all thematic maps into XML format and import this format directly for creating thematic maps;

Display independent control for each style in unique value and range thematic maps;

Save thematic maps into composite dataset;

Create thematic map use field expression;

Reserve field value when creating unique value thematic map.

The topoanalysis function in AvisMap GIS can rapidly and conveniently remove redundant vertices, lines, dangle line, and small polygons, merge adjacent nodes and pseudo nodes, track and build polygons, build network. AvisMap GIS creates original, special topology error thematic maps for helping data processor snapping and modifying the possible error by using different color and line style of arc with overshoot. It improves the efficient of data processing.

Spatial Analysis:

3D analysis

Network analysis

Buffer analysis

Overlay analysis

Grid analysis

Hydrology analysis

AvisMap GIS 5 has dynamic segmentation functions for linearity coordinate system and its analysis, and applied dynamic event overlap analysis. The dynamic segmentation in AvisMap GIS 5 sufficiency addresses the needs of large-scale application based on spatial database.