MATLAB® is a high-level language and interactive environment for numerical computation, visualization, and programming.

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373 views

how to calculate area of triangles formed by delaunay triangulation

After applying delaunay triangulation 160 triangles were formed. How can I calculate the area of each triangle using Matlab?
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1answer
99 views

Maintaining spatial integrity of Matlab matrix with missing data

I am working with MODIS Terra imagery (MOD13Q1). I am currently trying to compute the autocorrelation structure of the pixels in an MODIS NDVI raster. The problem is that I have clipped the original ...
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1answer
157 views

Using GDAL inside MATLAB in Ubuntu

I'm trying to use gdal_rasterize inside MATLAB via UNIX or system MATLAB command system('gdal_rasterize'). Despite this command working in my console terminal, I get the following error inside ...
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1answer
96 views

convert XML to PostgreSQL using MATLAB

In a weeks time I should be able to transfer the GIS data provided in the XML format to PostgreSQL database. I have prepared the PostgreSQL database (empty) and looking at Matlab scripts. (I am on ...
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1answer
21 views

Connect MATLAB to cartoDB using Database Explorer?

I set up a database on cartoDB. I'm trying to use MATLAB to connect to the database using Database Explorer. I've downloaded the PostgreSQL driver. MATLAB asks for connection Parameters: Server ...
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1answer
346 views

Trilateration algorithm code issue in Matlab

I am currently using the access point (Routers)as reference nodes and wifi chip(as Unknown tag). So i want to detect the position of unknown tag using 3 wifi access points as my tag can scan the ...
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1answer
113 views

Image Processing for vegetation detection using NDVI technique

I have a MODIS 250m resolution satellite image in jpg format.How do i do image processing using NDVI technique on it? Basically i have to detect vegetation for a 250m resolution MODIS image using NDVI ...
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0answers
542 views

How to limit a specific area in order to have a topographic 3D map using MatLab?

I am using MatLab, I want to build a topographic 3D map, I am following this guide, I have been doing the steps listed on the section Draping Geoid Heights over Topography, and I do not have any ...
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0answers
212 views

Iteration based positioning on Matlab - retrieving coordinates between iterations

This is my first question on SE so let me know if I'm not asking my question in the right place. So basically, I have an algorithm which uses UMTS measurement events for positioning estimation, which ...
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0answers
186 views

how to convert lat and longitude into distance near poles?

I am trying to convert latitude and longitude into meters in polar regions. I am looking for higher accuracy upto 0.00 meters preferably. I tried the haversine formula but it doesnt seem to be ...
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0answers
10 views

To filter the wrong data of point positioning

I have collected GPGGA data by Novatel OEMV receiver in static single point mode. I have so much data (GPGGA format) and I want to get the static point axis by averaging all data. But some of the data ...
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0answers
36 views

How do I compute uncertainties in the positions transformed using Helmert transformation?

I am familiar with Python, MATLAB and Mathematica. My data is given by Cartesian coordinates (positions in X,Y,Z (meters), standard deviations XX, YY, ZZ (meters) and a correlation matrix (XY, YZ, ...
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0answers
49 views

Auto generate waypoints for a map

I am working on a project where I need a function which generate way-points considering the obstacle in the area. For example, if a shoreline world-map is given and the requirement is to generate 100 ...
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0answers
89 views

Retrieving Aerosol Optical Depth (AOT) from Landsat multispectral data

I need to retrieve Aerosol Optical Depth from Landsat multispectral datasets. Has anyone successfully tried something like that before?
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0answers
203 views

Calculating distance in m in xyz between GPS coordinates that are close together

I have a set of GPS Coordinates and I want to find the speed required for a UAV to travel between them. Doing this by calculating distance in x y z and then dividing by time to travel - m/s. I know ...
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0answers
119 views

How to represent the time(weekly/monthly) variationof a polygon map using one image?

I have a base map made up of three hundred polygons, each polygon get lots attribute values(For example, each week/month get a value). But I want to draw only one picture(due to page limitation) to ...
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0answers
102 views

How do I account for changing latitude with a spatial filter?

I'm working with data in latitude/longitude grid form in a non-GIS specialised package (MATLAB) and wish to apply spatial filters to it. As this data contains a broad range of latitudes and is ...
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0answers
131 views

Reshape Matrix and perform Zonal Statistics in Matlab

I have 2 grids: 1) n by m - at 100m 2) n*10 by m *10 - at 10m. These grids cover the same area. I have to perform zonal statistics at scale of grid no.2. Cell value of grid no.1 is cumulative for ...
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0answers
1k views

How to project geographic coordinates (lat/long) to a cartesian system (albers equal-area)?

I am using this matlab package http://www2.ocgy.ubc.ca/~rich/map.html#examples to project the latitudes,longitudes of my data to a specific projection. For this particular case I am using albers ...
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0answers
6 views

how to export .tbx to matlab workspace ? where i can use it to process multispectral image

i am having a tool model and i want to use this model on an multispectral image in matlab export of .tbx in matlab working.(remember the image is just for an example to explain my problem.)
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0answers
18 views

Matlab array to KML

I am trying to use the KML toolbox for Matlab in http://www.mathworks.com/matlabcentral/fileexchange/34694-kml-toolbox-v2-7 to create a KML file from a Matlab array to be shown in Google Earth. ...
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0answers
63 views

matlab code for dividing cells

I want to divide a city map to hexagonal cells such as i enter it the diameter for a hexagon and it divide the city to cells then i enter to it parameters and it calculate the cluster number for the ...
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0answers
32 views

Wavelet analyses of ndvi using python or matlab

I want to carry out a wavelet decomposition and regression analyses on my NDVI data to see the relationship with other climatic factors like precipitation, temp. What kind of software is best for this ...
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0answers
42 views

Matlab code to calculate SEBAL Model

I am working on an article and I want to find a way to calculate SEBAL model.I have find an article(this) with have a matlab toolbox named EVAMAPER but could not find any download link of it, Does ...
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0answers
60 views

Add 2D array at regular interval along third dimension of 3D array

I am working with a three-dimensional datacube with dimensions x by y by z. I would like to insert 2D matrices (x by y) along the third dimension (z) at a regular interval. So say the 3D datacube ...
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0answers
72 views

Bi-Weekly NDVI data into monthly Datasets

I have NDVI data in both Ascii Grid format (0.250 degrees resolution) and raster format twice a month like: ndvi1981_07a ndvi1981_07b I would like to combine these bi-weekly values (average) into ...
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0answers
135 views

Extracting rooftops using MATLAB

I am using Matlab to extract rooftops of buildings and I want an orthoimage i.e. a .jpg file, a world file .jgw and a shape file .shp as input. A mask is needed to "hide" the pixels of the image ...
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0answers
71 views

'Out of bounds' Error in profile51 function of matlab

I am trying to Extract long profile data in Matlab. I have followed the steps of this pdf. Now, in Matlab I passed the function profile51(‘file_name’, ‘arcmap_directory’, ‘matlab_directory’, ‘n’); ...