Geographic Information System

Computer systems capable of assembling, storing, manipulating, and displaying geographically referenced information, i.e. data identified... | Contact experts in Geographic Information System to get answers

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Questions related to Geographic Information System

Earth Science - which Open Data Repository to choose?

In some time I would like to publish the results of my work. I want to publish data sets that are also part of my work. Which digital repository to choose that: is known among scientists in the...

05 July 2023 6,551 3 View

How to get the outlet coordinate (row and column) of a DEM matrix for topmodel in R?

Hi I am trying to set up a topmodel simulation in R. The flowlength function of the topmodel package, requires the outlet coordinate of the DEM matrix, i.e. the row and column position. Is there a...

25 April 2023 1,014 2 View

Ripley's K-function vs Moran's Index based cluster analysis?

Both Ripley's k-function and Moran's index measure the statistically significant clustering within data. However, how to know, which method is performing better for our data? What are the...

03 January 2023 2,036 2 View

How do I estimate forest cover change in R with rasters?

I am new to GIS, and I am developing a project evaluating forest cover change over 10 years (2010-2020) for a specific area in the state of São Paulo/ Brazil. I have this area as a shapefile, and...

27 March 2021 5,940 6 View

How to improve work with GIS software while working on a graphic tablet?

Do you have any tips and tricks on how to improve your work with GIS software while working on a graphics tablet? e.g. working with ArcGIS, SAGA GIS, QGIS... e.g. vectorization e.g. modules,...

06 March 2021 9,781 4 View

Irradiation data for JAPAN?

Hi, Could you help me to get the latest (2019, 2020) solar resource data for a particular site in JAPAN? PV GIS and NSRDB data are not in reach to JAPAN, I'm looking for some other database for...

04 March 2021 1,250 3 View

How to download the bulk download orders of Landsat 8 data from earth explorer site?

Iam trying for bulk download orders of Landsat 8 data from earthexplorere site, its almost 1 month crossed, but its showing as not started in the status.

03 February 2021 3,855 4 View

GIS application in flood management?

What is the best GIS approach in flood management?

27 January 2021 545 5 View

How can GIS be used in water utility management?

I want to undergo a research on GIS application in water utility management. All the literature I have come across so far on the subject entails the use of GIS and some engineering application. I...

26 January 2021 6,345 12 View

How can we determine the basin borders by GIS?

Hi We are working on a research about prediction river discharge in ungauged stations. we considered some stations and each of these stations has a sub basin that we know the area of each sub...

11 January 2021 3,955 5 View

What is the best model to be use for site prioritization using GIS-MCA interface?

What model can be use to identify prority risk site using multicriteria analysis and GIS techniques

06 January 2021 9,745 3 View

HEC HMS is suitable for modeling minimum how much Sq.KM area??

I am trying to build a hydrologic model in HEC- HMS. I have a watershed of 0.63 sq.km only and do not include any sub-basin. it is possible to develop a hydrologic model in HEC- HMS? further, I am...

05 November 2020 1,552 4 View

Any one know how to solve with my ETAP 12.6?

I am using ETAP power station 12.6 Enterprise version, and I want to try GIS module, and it shows this comment: " ESRI GIS system not installed! ETAP GIS functionality can't work without ESRI GIS...

27 October 2020 9,926 2 View

How to prepare flood inundation extent in GIS from water levels available at the centerline of the river?

I have water levels during flood at the center line of the river (100 km long) at every 100 m. I also have the DEM of the area in which the river flows. How to generate the flood inundation extent...

17 October 2020 5,388 4 View

Clipping issue in ARC GIS?

I have downloaded ASTER DEM data from lpdaac website The filename is "ASTGTM_NC.003_ASTER_GDEM_DEM_doy2000061_aid0001.tif". After clipping as per the requirement, the value of the elevation...

02 September 2020 5,606 3 View

Respected fellow members, can you suggest me some GIS based thesis proposal topics?

Dear all, I am currently in last year of Bachelor of Urban Planning course and mostly interested in doing thesis based on GIS application. Please suggest me some topics for the...

30 August 2020 9,854 6 View

How show NDVI MODIS index (MOD13A1) in Arc GIS?This collection of MODIS has calculated NDVI index and i want to show this index in my study area?

This collection of MODIS has 2 options for calculating NDVI index. First, we can calculate it from NDVI formula or we can use NDVI index that MODIS has calculated. I use both of them but they are...

26 August 2020 2,548 3 View

How can i use GIS & Remote sensing, in the application of water and sanitation safety plans by WHO(World Health Organisation ) ?

Hi, I have a masters project that i want to use the power of remote sensing and GIS in the implementation of the water and sanitation safety plans proposed by the world health organization to...

24 August 2020 3,866 14 View

How to generat a ASCII format data in GIS?

Dear you all: Recently i met with such a problem: i tryed to generate a ascii format buffer in gis, but i failed because it's headers are different from the research data. Failed result are shown...

12 August 2020 5,142 3 View

Discuss how GIS is being used as a tool in supporting the global fight against the coronavirus?

20 July 2020 588 13 View

What are the different methods of estimating snow melt contribution in runoff?

I want to estimate the runoff due to rainfall but the data I have, contains final runoff (i.e. runoff + snowmelt) so is there any method to calculate the contribution of snowmelt in the final...

17 July 2020 6,567 3 View

How to calculate the distance between points in Qgis?

I have a shape file containing almost 3000 points and a delimited text layer with almost 500 points. What I want to do is to calculate the distance between each 500 points and the nearest point to...

07 July 2020 3,967 10 View

Hi! Does anyone know about this error in GIS: ((invalid extent for output coordinate system)) this happened for projecting coordinate system??

Thanks for any help

05 July 2020 3,405 3 View

Method for surface water/river basin risk assessment of pollution using GIS?

I'm currently working on risk assessment of river basin to water pollution using GIS. However, I only find few previous studies(less than 10) that conducted surface water risk assessment via GIS....

28 June 2020 4,260 7 View

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