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

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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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154 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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3k views

importing shp file in matlab

I have digitize 3 rivers on google earth and converted into shp file to use in matlab. I have checked the shp file in Arcgis and they are working. But while opening in Matlab, matlab shows some error. ...
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103 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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808 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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141 views

Converting LIDAR based measurement to UTM coordinate?

I have lidar based measurement with azimuth elevation and range, I would like to convert this data to UTM coordinate. I know the position of the lidar in UTM coordinate system, so I developed the ...
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29 views

Converting u and v from WGS84 to NZTM2000 - Do I need to do vector conversion?

I have u and v wind component values in latitude and longitude in WGS84. I want to convert this to NZTM2000. I've converted the lat/lon in ArcView - (and will try in R) - but do I need to also do some ...
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791 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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263 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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228 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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45 views

Creating spatial plot with colored polygons in MATLAB from shapefile?

I have a shapefile of that has 1800+ polygon features. Each polygon has unique value. How to create a spatial map for visual interpretation. Here is what I have tried in MATLAB. clear all; clc; ...
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35 views

Georeferenced Image Overlay and export to new image

I have two Geotiffs (one satellite image, one clipped image). I want to put the clipped image over the satellite image, because it shows flow velocity from this shown glacier (see image below). I ...
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28 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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61 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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113 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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203 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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386 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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148 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 has lots of attribute values(For example, each week/month get a value). But I only want to draw one picture(due to page limitation) ...
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124 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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185 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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2k 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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11 views

Evaluating accuracy of registered images

I am performing image registration by extracting SURF features from 2 multi temporal satellite images, in Matlab, as explained here. The steps provided seem to work great for me, and I can visually ...
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24 views

Time Difference of Arrival

I am trying to implement indoor positioning system in Matlab. Does any one know any simple method to find the time difference of arrival.I have 6 references and one target.Need to find the time ...
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15 views

Arrangement of vectors and matrix in text file?

My ASCII file has a vector of latitudes, and the indices of those latitude values tie latitude values to the data sharing the same index. That is, if given: latitude[x=0,1,2,3] = 10, 20, 30, 40 ...
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40 views

How to map locations to the nearest road

I have say 10 positions (lat and long).These locations will be off the road. How can I map/project these locations to the nearest road using MATLAB.
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22 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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154 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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86 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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230 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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90 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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218 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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92 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’); ...