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1. Introduction
MRF strongly believes that web-based GIS editing represents the
future direction of GIS. MRF GISNet is the
result of many years’ research and development. It is totally web-based
and allows users to edit GIS features from web browsers.
MRF GISNet consists of Oracle Locator, MRF
SVG Map Server, MRF Digital Submittal, and MRF GIS Editor.
The architecture of MRF GISNet includes
three major components: The MRF GISNet Server,
MRF GISNet Administrator, and MRF GISNet User. The MRF GISNet
Server is mainly the MRF SVG Map Server, but it includes the newly added
oracle transaction module, MRF Clean processing module and other modules;
The MRF GISNet Administrator includes
the User Manager, Feature Class Manager, Application Manager, Display Manager, and Transaction
Manager; The MRF GISNet User is a web-based
application integrated with MRF GISNet Editor for
users to do routine GIS data maintenance.
System Architecture
2. Major Capabilities of MRF GISNet
2.1 Temporal GIS
Every transaction is versioned using Oracle
Workspace Manager. The user and the time of the transaction are also
recorded. Versioning makes it possible for a user to find all the
transactions that have occurred within a certain time period in a given
geographic area.
2.2 Concurrent Multi-user Editing
Each user will extract GIS objects from the
enterprise GIS database. Only the un-locked GIS objects can be extracted
and locked for editing. This approach prevents simultaneous editing of
the same GIS objects by multiple users.
2.3 COGO Commands
MRF GISNet supports
many COGO commands for precise placement of GIS features. The currently
supported COGO commands include:
·
Point (X, Y) input
·
Delta X, Delta Y input
·
Distance, Bearing
·
Tangent Arc
·
Non-Tangent Arc
2.4 Advanced GIS Editing
MRF GISNet Editor
supports advanced snapping to grid, node, and line segments. When a node
is moved, a user has the option to move all entities that are connected
to the same node.
2.5 Closure Calculation and Least Squares Adjustment
MRF GISNet will perform
closure calculation for each polygon based on surveyed distance and
bearing information. It will also perform least squares adjustment of the
surveyed distances and bearings. These capabilities will make it much
easier for a user to integrate a new subdivision into the parcel layer.
2.6 Digital Submittal
Users can import a CAD drawing representing a
new subdivision into MRF GISNet. MRF GISNet has the utilities to extract the entities occurring
in the same area as the imported CAD drawing and update them with the
contents of the digital submittal.
3. Sample Screenshots of MRF GISNet
3.1 MRF GISNet User Manager
The
user manager interface allows the administrator to add new users to the
system. Each user or user group can be assigned different levels of
access privileges (none, read only, extract, submit).
3.2 Feature Class Manager
MRF GISNet allows the administrator to create a new
feature class and define its attributes.
3.3 Main Graphical User Interface
The
user usually logs into GISNet and is presented
with the above main user interface. The user usually zooms into an area
of interest and extracts some GIS objects for editing.
3.4 MRF GISNet Editor
A
user extracts unlocked GIS objects into the Java editor to perform
editing. The editing is done in a user’s personal workspace, ensuring that the
corporate GIS database is not affected. When the user checks-in the newly created edits and
the edits pass integrity checks, the changes will then be visible to the
enterprise.
3.5 View Area Transaction and
View User Transaction
Since
each transaction is versioned in the database, a user can easily view all
the transactions of any given area as shown in the following screenshot.
Similarly, we can also view all the transactions committed by a user over
a specified time period.
4. Major
Benefits of Using MRF GISNet
4.1 Enterprise
GIS:
Most GIS users are using desktop GIS packages to do
GIS data editing. Only a small elite group of “professional” GIS people
use the desktop packages to do GIS editing. Most of the staff can only
view the GIS data through a web browser and some GIS applications may be
available to them to do some queries and analysis.
With MRF GISNet, any staff member
can access the corporate GIS system and do viewing, querying, analysis,
and GIS editing. In this regard, MRF GISNet is
a true enterprise GIS.
4.2 Flexible Access to the GIS
MRF GISNet is server-based
and is accessed through a web browser. This means that users can access
MRF GISNet functionalities from anywhere as long
as an Internet connection is available. Users could work from:
·
Office
·
Homes
·
Hotel Rooms
·
Field with a wireless connection
An enterprise can hire people living in a far away
place to conduct GIS maintenance for the enterprise remotely. For
example, the City of Los Angeles could
hire some GIS people in New York
City to work remotely.
4.3 Emergency Coordination
In the event of an unforeseen
terrorist attack or natural disaster, there is an immediate need for coordination
among federal, state/provincial, and local agencies. Using MRF GISNet, changes can be made by authorized people and
all other system users will be able to view the latest information. MRF
has presented its solution to City of New York
and County
of San Diego and
received very positive feedback. City of New York
felt that MRF’s solution would be very useful for
events such as the September 11 attack to the World Trade
Center. San Diego County felt that MRF’s solution would be a very effective
communications tool for its wild fire disaster response effort.
4.4 E-government
Various levels of governments could use MRF GISNet to offer e-government services to its
citizens. For example:
E-permit: Residents could use MRF GISNet to submit a permit application for a proposed
garage or deck. This will save residents from having to make trips to
city hall and could be done during evenings and weekends.
311: Citizens could use a GIS to
report a problem to a City. The problems could relate to a pot hole, a
traffic light or sign, or some objects on city streets. Using a GIS is more convenient
than phones or emails since the location descriptions are best done
through a GIS map interface.
4.5 Interoperability
MRF GISNet’s Oracle database
is designed to interoperate with ArcSDE, GeoMedia, MapInfo, and MicroStation
GeoGraphics.
If
you would like a live demo of our GISNet, please click here and send us your contact
information or call 1-877-216-5515.
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