Ravi Shankar
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Grid vs ground for a large public works project

Started this discussion. Last reply by Syed Shahzad Yusuf Jafri Jul 25. 6 Replies

Hi Team I need your advice on the "one step transformation" process for creating ground coordinates from grid coordinatesOur project area is a 260 km long proposed railway line corridor. The proposed…Read more →

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Started this discussion. Last reply by Ravi Shankar Jul 15. 4 Replies

Hi everybody,I am Ravi Shankar  from India. IndiaFor the past 9 years I am doing survey and mapping related projects in India and Middle East. Prior to 2009 I was working as a GIS engineer in…Read more →

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mike caffery left a comment for Ravi Shankar
"In the UK for rail projects we use Snakegrid. Google it and you will see what it does."
14 hours ago
Mohammad Rashed Ahmad favorited Ravi Shankar's discussion Grid vs ground for a large public works project
Jul 25
Syed Shahzad Yusuf Jafri replied to Ravi Shankar's discussion Grid vs ground for a large public works project
"Dear Mr. Ravi  It is the right way for a linear project to joint all the control points together if they are in the same zone. You have also use Scale factor without changing Original UTM co-ordinate. Multiple control points can…"
Jul 25
Bernie J. Marocco favorited Ravi Shankar's discussion Grid vs ground for a large public works project
Jul 25
J. Anthony Cavell replied to Ravi Shankar's discussion Grid vs ground for a large public works project
"Dear Ravi, I believe the disconnect between your work coordinated in UTM and the conversion by others. Converting between ground coordinates and a plane projection (grid) is more involved than simply applying a scale factor. One must correct for…"
Jul 21
Ravi Shankar replied to Ravi Shankar's discussion Grid vs ground for a large public works project
"Team  Many thanks for the reply. I wish to clarify a bit more on why the process I mentioned was followed.  There are two different survey teams in the project. One team did the railway corridor alignment design - It includes…"
Jul 21
⚡Survenator⌁ favorited Ravi Shankar's discussion Grid vs ground for a large public works project
Jul 20
⚡Survenator⌁ favorited Ravi Shankar's discussion I just Joined!
Jul 20
Ravi Shankar's discussion was featured

Grid vs ground for a large public works project

Hi Team I need your advice on the "one step transformation" process for creating ground coordinates from grid coordinatesOur project area is a 260 km long proposed railway line corridor. The proposed railway corridor needs to be designed after doing the detailed topographical surveyThe first step followed is : Established 85 pairs of control points (say GPS1 to GPS 85) along the corridor using DGPS.Second step: Convert the control point LLH (Lat,Lon,Ht) to grid coordinates (XYZ) based on UTM…See More
Jul 20
J. Anthony Cavell replied to Ravi Shankar's discussion Grid vs ground for a large public works project
"Dear Mr. Shankar, You describe a project with several issues to be addressed. The project is long (260 Km) and narrow. (Horizontal control will probably be OK vertical will be suspect.) You plan to record the survey data in UTM, which has high…"
Jul 19
Simeon Hill replied to Ravi Shankar's discussion Grid vs ground for a large public works project
"My suggestion is that you establish one base control point using your Ground Control Coords. Then localize on that point. Set your datum as WGS84 then carry out your survey. All your observations will be stored with Ground Control Coords. Using…"
Jul 19
CHARLIE B. AYCOCK, III replied to Ravi Shankar's discussion Grid vs ground for a large public works project
"Very interesting question. I am not prepared to comment off the top of my head but the problems are not unlike what is involved in highway construction. Various State Highway departments have published information on this, Texas as an example.…"
Jul 19
Ravi Shankar posted a discussion

Grid vs ground for a large public works project

Hi Team I need your advice on the "one step transformation" process for creating ground coordinates from grid coordinatesOur project area is a 260 km long proposed railway line corridor. The proposed railway corridor needs to be designed after doing the detailed topographical surveyThe first step followed is : Established 85 pairs of control points (say GPS1 to GPS 85) along the corridor using DGPS.Second step: Convert the control point LLH (Lat,Lon,Ht) to grid coordinates (XYZ) based on UTM…See More
Jul 17
Ravi Shankar commented on Jaybird's group Leica Support Group
"Hi Leica Support Team  I need your advice on the "one step transformation" process for creating ground coordinates from grid coordinates Our project area is a 260 km long proposed railway line corridor. The proposed railway corridor…"
Jul 17
Ravi Shankar joined Jaybird's group
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This group is for LSU members who use Leica Instruments in the field. This group is for discussions and tutorials related to Leica user.LSU is not directly affiliated with Leica and all logos and imagery are copyright of their respective owners.See More
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Profile Information

I am here because I am a.
Surveyor
Surveyor Bio:
Experience Nov 2012-Present Geotrax International Services FZB, Ras Al Khaimah
(UAE)
General Manager - Roles
 Lead Survey & GIS projects in UAE
 As lead survey manager responsible for planning and monitoring
survey activities, ensuring proper execution of works on site as
per specification and coordinate with the client.
Dec 2009-Nov 2012 Geotrax International Services, Hyderabad.
Technical Director (Roles)
 Lead GIS Engineer
 Project lead for establishment of Ground Control Network in the
NLRMP projects in Gujarat. Managed more than 30 teams
conducting the establishment of Ground control network
 Project lead for DGPS surveys of Mining lease areas in Odisha,
for Orissa Space Application Centre.
 Project Advisor for GIS basemap preparation for Dhalai District,
Tripura, India.
August 2001-Dec 2009 Intergraph Corp (Security, Government and
Infrastructure Division) Huntsville, AL
At Intergraph - Senior Software Engineer
 Senior lead for planning, design GIS software test environments
 Certified and Tested Core and Industry GIS/AM/FM Products.
 Lead Spatial Database Administrator (Oracle and SQL Sever) - Store and
Manage spatial data from multiple data sources.
 Provided increased support/Analysis to customer problems. Act as an
interface between Development and Customer for reporting customer
requirements.
 Suggested design changes and appropriate ways to implement the
products.
 Experience with working on GIS products suite and Solutions from
Intergraph, and ESRI. The list includes
1. GeoMedia Professional: Product for management of enterprise
geospatial data. Add-on products in the GeoMedia suite include
1994-1998 College Of Forestry, University of Agricultural
Sciences, Dharwad, Karnataka, India.
BS Forestry GPA 9.1/10.0
Computer Skills Operating System: IBM PC,Sun SPARC,UNIX, Windows 2000/NT/9x.
Programming Languages: JAVA, SmallTalk, C++, Visual Basic, VB.Net
GIS Softwares: Geomedia suite, G/Technology, Intergraph’s CAD based
Security Suite (primarily GeoSpatial Monitor), Arc GIS Desktop suite-
ArcView, ArcInfo, ArcEditor.
Databases: Oracle 10g (includes Oracle Spatial), Oracle 9i, SQL Sever
2005.
Interests Playing Tennis: Local tennis leagues
Company
Geotrax International Services
Licenses Certifications or Awards
GIS software developer
I have experience with the following
GPS, cadastral, topographic, boundary surveys, topographic surveys, control network surveys, GIS, Software Development, Aerial, UAS/UAV Drone Technology
How many years have you been surveying?
9
Most comfortable with the following types of instrumentation
GPS, Surveying Software, GNSS

Comment Wall (2 comments)

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At 5:15am on November 16, 2018, mike caffery said…

In the UK for rail projects we use Snakegrid.

Google it and you will see what it does.

At 1:23pm on July 15, 2018, Billy Brooks said…

Hi Ravi,

 I have another good friend from India,Raymond  Kingsly. I do not know if you know him,but thanks for wanting to be my friend. I am sure we will talk more in the future.

best regards,

billy

 
 
 

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