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Questions related to Geoinformatics
I needed to render temperature data from several sensors located in a large tank. Sensors distribution is really irregular. Moreover I have time series data and I would appreciate seeing how...
01 January 2015 7,691 4 View
I have data in shapefile format and want to use in ODV.
01 January 2015 2,438 5 View
How can use the landsat image for obtain carbon index?
01 January 2015 2,977 3 View
I have problem in smoothing the slope derived from digital elevation model. I want to do filter for the slope 20 degree slope...
01 January 2015 6,697 5 View
Hi Which is the the most recent techniques or methods for Modeling of land use changes? area: 110 square kilometers , Land use: agriculture, urban, pasture, forest, water, desertData Source: Maps...
01 January 2015 9,396 18 View
Please tell me with a real example the difference between Nugget Effect and the Screen Effect?
01 January 2015 9,351 4 View
I want to calculate LAI in Envi software, I am using formula LAI=0.57exp(2.33NDVI) I don't know how write this formula in band math Envi software, please tell me how I should write it in band math?
01 January 2015 3,129 2 View
Has anyone experienced "Data buffering failure (level 2)" error in FRAGSTATS 4.2? I am attempting to run Class level stats on a classified .img image (only two classes) using a user provided tile...
01 January 2015 8,681 9 View
ِDoes anyone know about latent heat flux algorithms?
01 January 2015 1,356 3 View
When we analysis some change pattern or spatial density distribution, we could create a grid with m columns and n rows to do analysis. As we know that the MAUP is an important problem is spatial...
20 December 2014 2,683 6 View
When we use the moving window to calculate density distribution in spatial analysis, the window size is a key parameter. While few of the researches talked about how to determine the window...
12 December 2014 1,190 9 View
Thanks in advance for your replies.
12 December 2014 1,650 3 View
12 December 2014 335 7 View
I need data related to soil thickness, regolith thickness, overburden thickness or depth to bedrock. This includes data points and maps from soil survey or geology (such as water well, surficial...
12 December 2014 8,694 4 View
in ArcGIS I can define radius size of circular neighborhood, and min/max numbers of neighbors. I've read that these decisions are somewhat arbitrary (I'm not doing accuracy assessment), but don't...
12 December 2014 5,691 5 View
In general the adverse biological effects were assessed by ERL and ERM. So, I did found detaills (step by step) for calculation. I ask if Some one can guive me details to calculate the effects...
12 December 2014 1,468 2 View
In recent years the notion of ontologies has become increasingly important in the design and development of knowledge based and expert systems. Geo-informatics involves development and integration...
11 November 2014 3,807 1 View
Is there any news on the timeframe for a global availability of SRTM-1 (1 Arc-Second) data?
10 October 2014 8,329 5 View
Time variations of geoid undulations computed from GGOS AGC reach 10-20 milimeters within certain time period. What is an interpretation and cause of this variations? Can it be considered as...
09 September 2014 6,812 1 View
I have to find some topographic attributes about a site affected by slope instability and I need a DTM with a good spatial resolution and moreover a good vertical accuracy.
09 September 2014 9,504 4 View
I have run model for MNDWI in ERDAS. I get an image in gray scale like single band image. That output gray-scale image is a little bit more enhanced than single band images, but i am not able to...
09 September 2014 4,457 3 View
Hi guys, I'm new in geostatisics and trying to build a irregular grid in SGeMS to calculate variogram model. But I don't know how. Seems SGeMS can only set the number of cells in X,Y,Z direction...
09 September 2014 8,179 7 View
I'm looking for an approach to automatically define the bankfull limits of a river channel having an High resolution DEM. I used the approach proposed by: Williams, Garnett P. "Bank‐full...
07 July 2014 4,238 7 View
We're working in a study to calculate the social vulnerability in small islands.
07 July 2014 9,699 13 View