Venkata Sai Krishna Vanama

6 Questions 13 Answers 0 Followers

Questions related from Venkata Sai Krishna Vanama

What are the data sources and data required in hydrological modelling in HEC-HMS and ArcGIS?

The study area is one of the metro cities of India.

12 August 2015 3,234 6 View

I have downloaded the Bhuvan DEM of Mumbai, why are the elevation values negative even on the hilly areas?

I have downloaded the Bhuvan DEM of Mumbai, the elevation values are in negative even on the hilly areas. 1.Is this negative values means the whole area is in depression?2.I want to create a text...

05 May 2015 7,051 12 View

How can I export a file in ENVI?

Dear all, I have generated a NDVI image in ENVI 5.1. And I exported it into both erdas imagine and TIFF/GeoTIFF format. I open both the images in arcmap and it showing different range of pixel...

12 April 2015 1,740 2 View

How can I calculate the NDVI when computing vegetation cover?

When doing computation of vegetation cover, how can I calculate the NDVI. Is it through using DN values or reflectance values. (TOA reflectance in case of Landsat 8)? Does acquisition time and...

11 April 2015 8,172 8 View

What is atmospheric watervapour content and how can I find it for a particular landsat 8 data?

What is the atmospheric watervapour content and how can I find it for a particular landsat 8 data? Which is the input while calculating the land surface emissivity (LSE)?

11 April 2015 9,080 3 View

What is the process for calculating Land surface temperature LST from Landsat 8, 7, 5?

Dear all, I am using landsat 8 TIRS, landsat 7ETM+, landsat 5 TM. For all them I have calculated the TOA radience, TOA reflectance and At-sensor brightness temperature by following the process...

09 April 2015 4,655 28 View