Change detection is the process of identifying changes in map content over time.

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Change detection between two Landsat scenes? [duplicate]

I want to do time series analysis and find change in NDVI. I have rasters where each pixel is represented by some value at a time. Also I have same thing but represented by points. And I would like ...
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61 views

Land cover modifications in different time periods

I have several shapefiles which contain buildings built in different periods from 1948 to 2013. My question is how could I see which buildings for example in were built 1948 but are missing in later ...
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Kernel density change detection

I want to detect change in two kernel density estimation rasters of animal sightings. These were created using the same bandwidth (and I'm assuming the same kernel function?) in ArcGIS 10.2. I want to ...
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1answer
50 views

Creating raster depicting landcover/use change in ArcMap?

How would I create a conversion matrix in ArcMap 10.2.2 to display the changes between two rasters (Land Use Land Cover Maps)? I have produced Land Use Cover Change maps from temporal satellite ...
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1answer
35 views

Sequential rasters - when did point x change

Using ArcGIS 10.1 with Spatial and 3D Analysts, and Python 2.7 I have a series of reclassified rasters in which every cell is either one or zero. I need to programmatically create a single raster ...
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1answer
121 views

Using Erdas for land cover land use change detection

New to Erdas but I have to do a project and I have chosen to do a landcover land change detection. I have two Landsat 5 images, five years apart from each other. My question is: what is my next step? ...
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69 views

How can I create a valid probability map of species distributions based on presence/absence data from multiple quadrats?

I am somewhat new to GIS and only beginning to learn spatial statistics/analysis. I am an ecology grad student doing a before and after study on invasive plants and their responses to management ...
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22 views

How to handle Molusce ValueError: shape mismatch: objects cannot be broadcast to a single shape?

I have a problem in QGIS Molusce plugin. I opened two raster files represeting LULC of 2 years, and roads as a spatial variable. The result of geometry check was positive. On Area changes tab clicking ...
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45 views

WFS, python and updating

I'm trying to develop a script, something that can be run every hour/day/week etc that will look at some shapefiles (initially downloaded from a WFS) compare them to the WFS and download and append ...
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35 views

Detecting geometry change between two line layers in QGIS

Looking to find a method of simply detecting if the geometry between two layers (line) has been altered. I have two layers of the exact same features but I suspect there is a difference in some of ...
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96 views

Calculating gain and loss area of vegetation land from two lines representing different years using ArcGIS for Desktop?

How can I calculate a gain and loss area of vegetation land having two different lines that represents vegetation in different years. Edit: There are two polylines, one represents the edge of ...
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1answer
112 views

Change detection between two classifications in QGIS?

I have two raster classifications. They have the same number of classes which use the same ID (each class has a unique ID). I would like to get information on the changes between classes i.e., class 2 ...
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22 views

Choosing time frame for change detection analysis?

May i know if there is any standard time scale on which change of land use/cover should be analysed? I have a difficulty choosing the time frame for my analysis. I mean how far apart do the years ...
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How to do Forest changes detection [duplicate]

Which one is better to use for forest changes detection AHP or MCA for spot 6 images
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3answers
142 views

Automated Forest Change Detection

Using two different time of images in the same places. Can i develop an automated change detection for forest area? What / which are the suitable software to used?
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2answers
359 views

Classification, change detection and NDVI using landsat 2 (MSS), landsat 5 (TM) and Landsat 7 (ETM)

I have 3 Landsat images for the same area. One in 1972 (landsat 2 mss), one in 1996 (landsat 5 TM) and one in 2010 (landsat 7 ETM). I would like to detect changes in land cover and create diachronic ...
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3answers
495 views

How to create several header files to open AVHRR NDVI3g (GIMMS) files?

I have downloaded GIMMS NDVI3g data from http://ecocast.arc.nasa.gov/data/pub/gimms/3g/ I now need to open the files in arcgis. I have the follwing GRID PARAMETERS: grid-name: Geographic Lat/Lon ...
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3answers
133 views

OSM Display a particular changeset-version of a way

Hi is it possible to visualize an particular changeset of an way? It's about thisa way http://www.openstreetmap.org/way/24837452 at the moment it seems to be a part of an MultiPolygon. But in the ...
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2answers
611 views

Change detection with raster calculator

After applying the Diff operator of the raster calculator in arcgis to view changes in land use, would like to see the areas of increased and areas of decreased. This is possible using the raster ...
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616 views

How to use the same ROI for multiple LANDSAT images in ENVI?

Suppose that I have 3 landsat images with the same datum ( WGS-84 ) and projection system ( UTM, Zone 39N ) as follows: TM LANDSAT 5 image for July 1987 ETM+ LANDSAT 7 image for July 2001 OLI_TIRS ...
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Finding obstructions along a stream with LIDAR

I'm trying to find obstructions to boat traffic (downed trees, collapsed bridges, etc) along medium sized streams (5-15m across). The obstructions may or may not obstruct water flow. I have good ...
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1answer
49 views

How to store the CHANGES to a map database

I'm looking into providing a map amendment service for a particular map series. The service will help map owners look into the changes made to the operational features of the map, after the map was ...
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259 views

How to do change detection between two Landsat scenes?

I want to do change detection and calculate the changes step by step using two images: the first image Landsat 1986, and the second Landsat 2000. Actually I have used image differences in ArcMap and ...
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1answer
294 views

How to get “p value” for time series data to detect significant change

I have yearly maximum NDVI data (1982-2008) and extracted all value to Excel. Also calculated slope value for each point during the 27 years. All of you know the slope value represents changes per ...
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2answers
1k views

how to do change detection in ERDAS

I'd like to ask a really simple question. I want to obtain the size of unchanged, decreased, and increased area etc (just like shown in image below) from 2 classification images in 2000 and 2007. How ...
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172 views

How can I know how many percent of area changed between 2 time step in arcgis?

I'd like to ask how to do change detection in ARCGIS? I need an image to show how many percent of area in class has been changed between 2 years? for example in output image, red is the area that has ...
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1answer
111 views

GRASS 6.4.3 Landsat processing

what are the pre-processing steps required for landsat etm+ with GRASS 6.4.3 prior to land cover change detection? The product used is L1T.
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291 views

FME Changedetector and Projected coodinate system problems

I was struggling with ChangeDetector and all the transformers that can detect geometry changes. For my project i have to extract geometry changes(Deleted, added and updated features) between two ...
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1answer
2k views

Can Arcmap 10 do change detection?

I have an assignment to find out changed areas of the two different layers ( let's say 2000 and 2010).the layers are vector. Is it possible to detect the changed areas by using Arcgis?
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321 views

Looking for a web service for change detection

I'm looking for service that provides me a change detection service based on a database of remotely sensed data. Has anybody happen to know such a service? The service I am looking for is a geoportal ...
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391 views

How to produce a vegetation stress map utilizing the spectral blue shift of the red edge?

I am interested in mapping vegetation stress utilizing the blue shift to the red edge phenomenon in remote sensing. The figure below shows the expected change in reflectance of green leaves under ...
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3answers
8k views

Analyzing differences between two shapefiles to put results into new shapefile?

I have two polygon shapefiles of the same region from two different years (1985 and 1997) and I need to analyse the differences between the two shapefiles resulting in a third polygon shapefile ...
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1answer
87 views

Generate a matrix of change from shoreline vector time-series data

I have shoreline vector data that corresponds to property ownership, and time series data referring to attributes such as erosion levels, shoreline class (ornamental, natural, regenerative), etc. At ...
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448 views

How to see what lines have changed in an updated Shapefile?

I'm using my county's GIS data to update the roads in OpenStreetMap. I have a copy they published last year and one that was just published, and I'd like to find all the LineStrings that have either ...
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What is Change Detection and how I can perform such analysis with open source tools?

From wikipedia page: Change detection for GIS (geographical information systems) is a process that measures how the attributes of a particular area have changed between two or more time periods. ...