ENHANCEMENT MAP DATA PLAN for SURVEY REPORT
1) Introduction to Line of Site (LOS) results
Many survey reports and quality of survey results have been changing resources time to time. One of the root-cause of the survey report issues has been the unavailability of topographical maps from site data. Thus resulted in the inability to verify the integrity of the LOS survey result presented.
The LOS problem arises precisely because there are so many critical points out there, seen and unseen. The challenge is how best to identify the LOS and Antenna Height from Field survey and Map data analysis, so that we introduce Path-profile analysis with Mapinfo data Software.
The Line of Sight survey reports are required to demonstrate the antenna heights that predict accurately and plan for the MW networks associated field survey.
In order to check the accuracy of LOS requirement and the limitation of structure height,the Pathloss software enables the user to make pathprofile with Mapinfo software database accurately.
2) Overview
The purpose of this document is to take a critical look at the LOS Report associated with the Mapinfo database Image from Mapinfo software and Pathloss profile data. The comparison from different type of map database and analysis of the path-profile will be used the additional Clutter map data to determine the proposed antenna heights.
The Pathloss software and Mapinfo software database will generate the reliable survey results and evaluates the process in conjunction with the field survey data ( LOS from the binoculars-on-rooftop method). Used in conjunction with the Path-profile analysis and Mapinfo Version software allows the user to see correlating results via a point-and-click process.
3) Current Survey Report and Path-profile database
3.1 Budget Plan with Terrain Database (USGS30)
This document is prepared with the sample one link analysis consists of two sites to generate all Path-profile with different database. The high resolution
Map data will help to compare the profile and critical points from LOS results, The test profiles will be based on the GTOPO30, Mapinfo_Geo Map. Mapinfo_UTM Map, SRTM_3Arc data.
3.2 Terrain Database (SRTM_3Arc)
The Shuttle Radar Topography Mission (SRTM) is a joint project between NASA and NGA (National Geospatial-Intelligence Agency) to map the world in three dimensions.
SRTM data is being used to generate a digital topographic map of the Earth’s land surface with data points spaced every 3 arc second for Global coverage of latitude and longitude (approximately 90 meters).
SRTM “finished” data meet the absolute horizontal and vertical accuracies of 20 meters (circular error at 90% confidence) and 16 meters (linear error at 90% confidence), respectively, as specified for the mission. The vertical accuracy is actually significantly better than the 16 meters. It is closer to +/- 10 meters.
4) Survey Data and Report Enhancement
The survey reports are required to demonstrate the antenna heights that predict accurately and plan for the MW networks associated field survey reports.
In order to meet the accuracy of LOS requirement and the limitation of structure height,The Pathloss software enables the user to make pathprofile analysis with Mapinfo software database.
MW networks design will get the benefits of accurate LOS determinations at substantial time saving. The software analysis is flexible and can be adapted to meet the LOS changes and the specific critical requirements of LOS confirmation.
This report also provides an overview of the improvement of Survey Results, that includes site and link with clutter image of map contents.
We will use the survey map data with Mapinfo Version and Pathloss Pathprofile results that satisfies the demanding line-of-sight (LOS) requirements. To confirm with field survey, LOS Report will inlude path details and potential antenna height. The path analysis will provide the reliable and accuracy results from preliminary survey plan. The pre-confirmed sites will get LOS and critical site analysis by Software Programs.
4.1 Enhancement Terrain Database (MapInfo map data with Pathloss *.GEO Image and *.UTM Image )
MAPINFO , DEM Data: Vertical Accuracy +/- 6 meters (with actual accuracy closer to +/- 3 meters). Horizontal accuracy 20m – 30m.*
Data Source : We have primarily use two sources of data – SRTM data ( 3 arc second, i.e., 20 m horizontal accuracy) and vertical accuracy of +/- 6 metres. 1:50K, 1:200K russian topographic maps and to fill the gaps into SRTM, improve the overall accuracy of the DEM and also to verify the vertical accuracy of the data.
Interpolation Method: TIN Interpolation. Triangulation involves a process whereby all the original data points are connected in space by a network of triangular faces, drawn as equilaterally as possible. This network of triangular faces is referred to as a Triangular Irregular Network (TIN). A smooth grid surface is then fitted to the TIN using a bivariate fifth-order polynomial expression in the x- and y- direction for each triangle face. This method guarantees continuity and smoothness of the surface along the sides of each triangle and smoothness of the surface within each triangle.
*The proposed MapInfo data is much more accurate than GTOPO 30. GTOPO 30 data is 30 arc second resolution data ( approx. 1 km horizontal accuracy) and at best +/- 18 meters vertical accuracy (can be as poor as +/-97 meters). This low accuracy is compounded in GTOPO due to low horizontal accuracy.
Linear & Clutter Data : Linear Vector data collected from 1:200K Russian topo maps and updated using the latest LandSat 30m resolution data includes Landmaks, roads, highways, railways, coastal boundary. Clutter data collected from 30m resolution satellite imagery and classified into 15 classes. (Inland water, River, lake, seasonal water body, Open land, quasi open, low density vegetation, high density vegetation, Suburban, village, Urban high density, urban medium density, urban low density, industrial, airport.)
Clutter data collected from 30m resolution satellite imagery and classified into 15 classes.
Results
The results of sample data review contained herein are the detail map data with various clutter images. From providing new improvement of LOS report, the independent of what a site has planned for the Microwave Networks, the Survey data should have significant improvement of LOS verification.
The purpose of this document was to examine the quality associated with the antenna height & LOS for microwave links. In evaluating the result Image of Path analysis from Mapinfo and Pathloss software, it becomes clear that the LOS and Proposed antenna heights are more reliable.
Initially, the need to confirm and LOS path between two sites by field survey physically has been slow process. Utilizing a blend of LOS checking results from field survey, Pathloss Analysis and Mapinfo software will provide more accurate Survey Report, the report will be able to improve quality, accuracy, speed and we can add and remove more option sites for LOS verification. By utilizing Pathloss and Mapinfo software in link designs, softcopy images can be further magnified as needed by the user. The database and software permit the easy identification of viable heights for antenna.
In addition, while the software find path-profile analysis, The Mapifo Clutter data can be collected from 30m resolution, Mapinfo database will provide the road access to choose option sites and the survey process could further reduce time schedules.
Altogether, it has been shown that LOS path-profile must be determined efficiently and accurately in order to keep schedule manageable. We have provide solution that Map data and Microwave Networks with accurate LOS determinations at a substantial time savings.