Creating vector features automatically from point cloud (LIDAR) data or raster data using image processing techniques.

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16
votes
4answers
2k views

Is there a tool that performs automatic recognition of buildings?

I'm wondering if there is a tool, which takes a satellite map of a region, detects typical buildings and allows the user to review its result (check, whether the tool correctly identified the ...
12
votes
3answers
5k views

Land Cover Feature Extraction from Satellite Imagery

I'm interested in a low-cost or open source solution for creating land cover GIS layers that utilize both spectral and textural extraction algorithms. I have used PCI Geomatica, ENVI, and Feature ...
10
votes
1answer
240 views

Automated detection of tracks

Given an area with depressions in open area from; say all terrain vehicles driving on soft surface. The vehicles will cause parallel depressions (paths) of about 10-20 centimeters in depth and around ...
8
votes
2answers
478 views

Practical Building Extraction Algorithm Implementation

I've been reading many papers over 3D building extraction using LiDAR data and Aerial images. I see that there are many different algorithms for doing such things, such as this and this. Those papers,...
8
votes
1answer
594 views

River boundary (bank) extraction from LiDAR

Is there any way to extract a river boundary (bank) from LiDAR data and its products (DEM, intensity image and slope) automatically? Digitizing is very time consuming.
8
votes
2answers
6k views

Building extraction with LiDAR data (Improve Process)

I have the following process for automatically creating building outlines/footprints from Las files and was wondering if anyone can help improve it or has suggestions for other processes to use? ...
7
votes
1answer
713 views

Ditch Extraction using LIDAR DTM (1m resolution)

I'm trying to extract ditches using the LIDAR DTM using the software eCognition but I am actually having a hard time since the paper where I based my workflow entitled "Ditches’ network extraction and ...
7
votes
1answer
161 views

Extracting wall information using LIDAR data?

I'm trying to extract wall using the LIDAR. I have tried Fusion, Whitebox, Lastools in Arcgis, Saga and Envi. Those are tools that I can use. The walls I am interested are mainly 1 meter high. Some of ...
7
votes
2answers
1k views

How to extract vectors from map using QGIS?

I am trying to extract building footprints from a raster map (as shown in the example below). Please note that the maps are out of copyright, have been scanned and georectified by a library and have ...
6
votes
1answer
1k views

Can I specify a point and get all features within a certain radius of this point?

I have recently shifted to QGIS from ArcGIS and am looking for some help/pointers with the following: Does QGIS have a method by which I can specify a lat-lon coordinate (or a utm x,y coordinates, ...
5
votes
1answer
280 views

LiDAR Feature extraction specifications/standards

I have vector data representing forests/trees/buildings that have been automatically extracted from LiDAR data. I am looking for specification/guidance for LiDAR derived products, or any standard for ...
4
votes
2answers
405 views

Why use feature extraction?

Why is feature extraction important? Why do we have to reduce the feature space? Is it only a computational problem when we use hyperspectral imagery or does this procedure improve the ...
4
votes
4answers
1k views

Converting NoData to 0 values in ArcGIS Desktop?

I have a raster of landcover that I have reclassed and the different land cover classifications are now represented by numbers which correspond to fertilizer inputs. Using ArcGis 10.3, I am trying ...
4
votes
2answers
63 views

Pattern search in satellite imagery

I would like to search for the specific buildings (polyhouse in my case) on the map like the one shown here Are there any free options available which can give me lat and lng of such shapes/...
4
votes
1answer
2k views

Extract parcel layers from vector pdf

So, I have an interesting problem... I have a PDF file which has over 100 pages and each of these pages is displaying a map in vector format. By using some third party program I was able to find out ...
4
votes
0answers
129 views

Counting number of plants in area using images from UAV?

How do I count the number of pineapple plants in a 1-hectare block? I have heard of these algorithms but I don't know how to do it. I'm still a newbie of QGIS, ArcGIS and ENVI. I have the NIR, RGB, ...
4
votes
0answers
157 views

What open source solution would work best for auto extracting features from satellite images? [duplicate]

Possible Duplicate: Feature Extraction - Land cover I have been looking for an open source solution which would allow me to define a region (or collection of images) and extract features from ...
3
votes
2answers
251 views

Draw Paths Automatically

I have the following data: The pink represents digitized hiking trails done on a different software that is completely inaccurate compared to raster images. They do however have attributes with the ...
3
votes
2answers
501 views

Raster image thresholding using python

I would appreciate if someone could guide me for applying thresholding technique to input raster image using Python. I intend to extract impervious surfaces from a high resolution raster such as roads,...
3
votes
3answers
3k views

How do I extract beginning/ending points for polyline shapes?

I need to extract the beginning/ending coordinates of every shape within a polyline shape file. It would be best to actually add them as values within the shape files .dbf (I can live without doing ...
3
votes
1answer
113 views

Check for feature existence before extract by attribute Arc GIS Model Builder

I have a model that runs through a series of Rasters in a folder and extracts individual crops as layers cyclically. The problem is that if the crop is not grown in a particular state, the model ...
3
votes
1answer
578 views

Extract data from QueryLayer to Shapefile

I have a QueryLayer that I need to export as a shape file. This was previously implemented as an ArcSDE feature class which we converted to a QueryLayer (running against SQLServer) in order to have "...
3
votes
0answers
489 views

Single Tree detection

I was wondering how I could extract "crown area" of single trees in a forest from a high-resolution image with only 3 band (RGB) in ArcMap. ( No NIR to use NDVI as any threshold). I need a fast easy-...
3
votes
0answers
905 views

Extracting flow accumulation to stream shapefile

I would like to create a shapefile that displays the flow accumulation for a given point in a stream channel. Is this possible? My client wants a map that shows the accumulated flow/catchment area ...
2
votes
2answers
308 views

How to automatically convert dots on paper maps to vector points?

I have several paper maps with dots that I need to convert to vector points. I was hoping to get some suggestions on how to accomplish this without recreating each and every point by hand. I know ...
2
votes
2answers
690 views

Create polygon of buildings from Quickbird images in QGIS

I have Quickbird/Ikonos/GeoEye image and want to extract all the buildings from the image as an independent layer in QGIS. How can i achieve that?
2
votes
2answers
273 views

How to remove roads from dataset

I've got a shape file that I loaded into PostGIS that has both road and parcel multipolygons and I need to remove the roads. I tried loading the shp file in qgis and it loads them both as a single ...
2
votes
1answer
127 views

Extract coastline as a vector from landsat 8 imagery?

I am trying to detect some sea level rise/fall for a specific region, from Landsat imagery. I went through the recommended methods of identifying water/land (MNDWI, AWEI, Bandratio 5/2, etc.). Now ...
2
votes
1answer
98 views

What program can I use to highlight and calculate multiple areas on a satellite image?

I would like to calculate the area of all the parking spaces in my city (North Miami Beach). I would highlight the parking in two layers, commercial and residential, and then export it to Excel and ...
2
votes
2answers
524 views

Counting plants in aerial images using unsupervised classification?

I am relatively new to GIS and I have the following problem: I want to extract the number of plants per row in a crop land. I have and RGB mosaic from aerial images. I think that I could do an ...
2
votes
1answer
85 views

Extract manhole covers from ground LiDAR

I am wondering if anyone has come up with an automated or semi-automated workflow for extracting manhole covers from LiDAR data in ArcGIS? I was thinking about looking at the change in elevation ...
2
votes
0answers
82 views

Improve tree extraction method

I want to extract trees from a given normalized Digital Surface Model (nDSM) in SAGA GIS. My workflow is the following: Applying a Gaussian Filter to the nDSM with search radius with standard ...
2
votes
0answers
339 views

Segmentation Image used to classify RGB image in ERDAS and GIS

My ERDAS 2013 does not have the advanced Image Objective Extension for feature extraction.. I am using thus the tool Image Segmentation (Unsupervised -> Image Segmentation) to classify my RGB image ......
2
votes
0answers
356 views

Extract road defects from terrestrial LiDAR, in Erdas 2012 or ArcGIS10.1

I'd like to extract road defects from a lidar point cloud. So, wherever a road surface drops or raises by a few mm relative to 100 cm around it. I know it's possible but I just can't find or figure ...
1
vote
6answers
303 views

In what real-world examples do users still digitize features from a map?

Is digitizing of map features completely dead? For example, when and why do you still digitize features from a map? It can be heads digitizing up from a scanned paper map (or image, or whatever) or ...
1
vote
2answers
1k views

Extract pixels from NDVI in ArcMap

I have a NDVI that I created from a Landsat 5 image. Is there a way to extract all the pixels above a certain threshold and save it as a shapefile? I am trying to create a vegetation mask of sorts to ...
1
vote
0answers
22 views

exclude value from feature analysis classification (ArcGIS extension)

I am using feature analysis to classify small (mm) round features from the landscape. I have calculated the circularity of each shape and I want to exclude those which are not round enough. Does ...
1
vote
0answers
48 views

How to extact very narrow water linear features from GeoEye-1 image

I need to extract beaver channels from a GeoEye image (attached image). What is the best approach to automatically delineate such very narrow and not very sharp water features?
1
vote
0answers
185 views

Orthogonal correction of building footprints after extracted from a raster

I have ArcGIS 10.1 and am working on a project involving extraction of vegetation and building classes from LIDAR (unclassified) data and aerial imagery (resolution 30x30cm). I have managed to ...
1
vote
0answers
214 views

Identifying dwellings/homes from imagery using ArcGIS for Desktop?

I have a task where I need to identify dwellings/homes on property lots. The data that I have is an aerial image of the town, cadastre/property boundaries, land tenure information and land-use. I ...
1
vote
1answer
151 views

Algorithm to detect entity (aircraft, ship, etc) intrusion into geographic area

I have been tasked with coming up with an algorithm to determine whether or not an entity (aircraft, ship, etc) is inside or outside of a geographic area defined as a set of geodetic (lat/long) ...
1
vote
0answers
56 views

How can I get a remote village transportation network from openstreetmap?

How can I get such a remote village transportation network from openstreetmap? nodes represent remote villages links represents public transportation tools, like buses Something like that: It ...
1
vote
0answers
112 views

extract roads, railways and canals out of old orthophoto

how is it possible to extract the roads, canals and or railways out of this image (black-white)? Or how is possible to create lines at the edges of the roads, canals and or railways?
0
votes
1answer
109 views

Extracting features from raster data using ArcGIS Desktop?

I want to extract flood related pixels from my imagery. I calculated mLSWI(Modified Land Surface Water Index). According to the literatures, mLSWI >= 0.5 is flood pixels. How do I identify the ...
0
votes
3answers
93 views

Extracting impervious areas (buildings, rails, pavements) from LAS dataset [closed]

How to extract impervious areas (like buildings, rails, pavements etc.) from las dataset and receive it like a raster? I tried to do it with intensity, but there are many valids with vegetation. I ...
0
votes
1answer
696 views

Fields from a selected feature set are missing when gp.submitJob(..)--in Flex— pushes feature set to geoprocessing service (in Python)

I am extending existing query functionality that I have added to the ArcGIS Flex Viewer. I would like to extract the results from a query--which consists of a FeatureSet--into a .gdb. In order to do ...
0
votes
0answers
12 views

Advice on which open-source GIS program to choose for object oriented feature extraction [on hold]

I need to extract polygon features from a series of raster images I have. I think that object oriented feature extraction might be the way to go, i.e. segmenting the image, and then doing an ...
0
votes
0answers
26 views

Extract specific altitude curve from raster

Is there any way one can extract a specific curve from a raster DEM qith QGIS? I know I can extract all curves, specifying the desired altitude interval between curves. But I was interested in ...
0
votes
1answer
61 views

Issues with raster data on postgresql / error:Attempting to get pixel value with out of range raster coordinates

So here is the issue, i am trying to extract values from a big raster divided in 200 or so tiles and applying them to a selection. The points are startpoints, endpoints and midpoints from vector items,...
0
votes
0answers
52 views

Generating outlines of islands using QGIS?

I have a (raster) satellite image showing islands. I wish to extract the boundary (shoreline). I tried a simple classification with just two groups (land and water). Unfortunately too many ...