Questions tagged [orthophoto]
An aerial photograph geometrically corrected and adjusted for topographic relief, lens distortion, and camera tilt - such that the scale is uniform.
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Method in QGIS to classify veg from HiRes geotiffs created in Pix4D?
I have 10 2D geoTIFF orthophotos (~2GB each, ~3km2 each, all 4.2cm/pixel) that I generated from Vis RGB 12MP images in Pix4D for a desert vegetation survey over 30km2 for a development. I need to ...
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Determining acceptable RMSE for Orthorectification?
I have been reading about orthorectification and did some training on it but my question still remain unclear is how much RMSE should I aim to ?
I will be working on a lot of aerial photos that ...
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Finding total area and percentage of specific color band value from Orthomosaic?
I want to get statistics for a color band within an orthomosaic. Specifically I want to know what area or percentage area of the raster is above a particular value.i.e. band 2 > 60. I'd like to know ...
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Photomosaic non-georefferenced images using open-source software
I have a directory of images that were captured by drone. The images have GPS info in the EXIF tags but are not georefferenced and do not have world files. I would like to merge these photos into a ...
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Tile names & coordinates relationship
I'm aware that this site is intended for cartographers, geographers and GIS professionals. I must admit that I'm absolute beginner in the area of maps, but not in the area of programming (40+). I hope ...
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Make images/PDFs in QGIS from Vector Layers [closed]
I have a bunch of vector layers and a few polygons that I want to use to create a image out of while having my image in the background of an aerial photo. I am unsure what commands to use to ...
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DroneDeploy generated Ortho shows skewed in QGIS (projections OK?)
I've recently bought a drone and have been having a lot of fun enhancing maps with very detailed orthomosaics.
The images place correctly once loaded in QGis, absolute positioning is good enough for ...
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Define characteristics (wave lengths, etc) of bands created by split order in Orfeo Toolbox
I have an orthophoto layer (exported from photoscan, drone images) that consist of four bands.
I extracted bands using "split image" order, but I can't understand which of them are NIR, green, red ...
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QGIS upload Ortho NAIP raster layer problem - loaded a raster file, georeferenced, however is blurry
Relatively new QGIS user. I am trying to correctly upload an ortho NAIP file I got from the USDA geospatial gateway. I successfully uploaded the raster layer from a .sid file of a county. As I zoom in ...
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Using Orthophotos - not multispectral - to generate Object-oriented image classification vectors?
I'm using QGIS version 2.14.3-Essen on a Macbook pro. I'm sort of new to this and feeling my way through this.
I have high-resolution Orthophotos officially sourced from local country in Sub-saharan ...
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Automatic extraction of manually selected points in ArcMap [closed]
I have an Orthomosaic and a DEM (both are in Geotiff formats and have RGB values) of a site, and I want to check their accuracy. For this purpose, I measured the 3D location (with mm accuracy) of some ...
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Making a TIN from an orthophoto
In ArcGIS for desktop I'm trying to create a TIN from an Orthophoto that has control points, the photo is high quality and has a huge amount of control points.
I'm just having issues creating the TIN ...
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Identifying and Placing Points on DEM Features using ArcGIS Desktop?
I am using UAV acquired imagery to identify trees at a peat land in the UK. I have a DEM and an Orthomosaic which i have created which can bee seen here (note: the Orthomosaic is at a much higher ...
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Overlay orthophoto with DTM
I am having a .dxf DSM and a georeferenced .tiff orthphoto. I would now like to simply overlay the orthophoto onto the terrain for visualization purposes. The DSM contains buildings, whose triangles ...
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OpenDroneMap: How to produce correct georeference ortophoto from UAV?
I am trying to produce proper georeferenced ortophotomap from UAV mission using OpenDroneMap (ODM), like I have done the same thing using APS Suite from Menci
In both cases I have the same images with ...
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Cutline mosaicing areal imagery with open source software [closed]
I'm very new in gis, and i'm trying to find a fast solution to merge 200 historical areal images(black and white from 1944). I orthorectified them manually, using gcp-s. They have 1 to 10 meters error....
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Geoserver WMS raster problem
I have the following problem:
The edge of the imagemosaic is not fit well, Im using geoserver imagemosaic tool to serving orthophotos through wms server. Is it a CRS, Bounding Box problem?
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Using orthophotos as basemap in CartoDB? [closed]
I have seen a java example of how to use a raster overlay in CartoDB, but what about replacing the basemap entirely with orthophotos?
In the web GUI for selecting basemap there is an option for the ...
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Creating fishnet grid polygon layer from set of ortho rasters in ArcGIS for Desktop?
I have a set of ortho slides (SID format) for my city. The slides do not overlap, and cover the entire city and immediate environs. What I want to do is create a grid-like polygon layer with separate ...
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Storing non-orthorectified images in GeoTIFF
I'm reading GeoTIFF and GDAL documentations and I'm trying to understand what type of transformations are supported.
GeoTIFF documentation says you can use ModelTransformationTag to define a ...
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Can I download Google Map Orthophotos using QGIS?
Does QGIS have functionality to download Google Map Orthophotos? Or any other open source GIS?
I specifically want to be able to not only view Google Maps on my GIS, but also be able to download the ...
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Index TAB for large raster files
I received a batch of aerial images along with an index file that essentially tells me which aerial image covers each 20x20km tile. Can I also create this type of index TAB through MapInfo?
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Aerial mosaic of thermography
I have a large set of aerial images (thermography) some of them are very tilted due to the airplane turning. I want to merge all the images into a unique orthorectified image. I have not the GPS ...
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Can't generate true orthophoto from my software
I am a GIS specialist and a surveyor. Lately I'm trying to use as a surveying tool my DJI Phantom 3 pro combining with different software for generating DEM, DSM, 3d model and orthophoto. But I can't ...
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Current Leaf-off HiRes Orthophoto Alternatives to Pictometry
Our nonprofit organization has subscribed for several years to Pictometry's aerial orthoimagery. Where there is coverage (in most metro areas), the quality of the leaf-off imagery has justified the ...
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Measure building lean in ArcMap?
I was wondering if anyone is aware of any tools that are available to measure building lean in ortho images from within ArcMap. I am aware of calculations and processes that can be used to measure and ...
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Working with orthophotos on an SSD drive vs HDD drive: is the performance gain significant?
I'm shopping for a server that will allow my coworkers to use QGIS through a terminal server. We have 2 Tb of orthophotos in tif, twf, ecw and shapefiles format. They tell me that actually when they ...
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Extract metadata with arcpy from orthoimagery
I'm very new to ArcGIS, and GIS is general. I am trying to build a script that will extract metadata from orthoimagery .tifs. Below is my test code to see if I can get the metadata from one file. It ...
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USGS National Map Ortho - Digitizing
As a part of project scope we have to deliver to the Client digitized data sets – some houses and roads. Can we use USGS Orthoimagery from The National Map layer for feature digitizing?
http://www....
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Image cache on network drive vs. SDE/Oracle
We currently have all of our image data loaded into ArcGIS SDE/Oracle 9.3. There is a proposal to not load our 2015 orthoimagery into SDE/Oracle in order to save time and place it in a tile cache or ...
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Orthophoto Free Download?
I'm looking for Image datas for East Africa. Specifically for Rwanda. Does anyone know if such data are available at all free? My target is to digitize roads and buildings with the help of image datas....
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White Pixel in Raster (CIR) arcmap 9.3
i have to analyse forest cir orthophotos. in high scale resolution, many white pixel appear instead of red ones.
i work with arcmap 9.3, win7
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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?
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Geometric quality of orthophotos
I have a lot of historical orthophotos, like the year 1950 of a region
I have also of the same region the orthophotos of more recent years such as 2012
The question is how to compare and quantifying ...
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How can I identify types of crops in agricultural raster dataset?
I have some 2014 MrSID files from the National Agricultural Imagery Program (NAIP) that I've converted to TIFF files. I want to use them to find the area of tomato farms in a watershed. I'm using ...
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Compression Artifacts and GDAL
I am working with large tiled (no overlap) datasets of ortho imagery that has been mosaicked in ArcGIS and exported as a single, merged TIF for the entire AOI.
These images need to be compressed so ...
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Georeferencing declassified CORONA images of coastlines?
I'm trying to georeference declassified CORONA images of coastlines in order to asses coastline changes and human impact.
In most case, georeferencing is easy, but since images of coastlines can only ...
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UAV Image collection Procedure
Do we need to collect ground control points before flying drones or do the drones collect control points during their flight ?
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Aerial photo stitching and georeferencing? [closed]
I need to georeference 53 air photos from 1981 (1:25,000 scale) and was wondering what would be the most efficient, defensible, and accurate option. For context, the air photos are following a highway ...
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3D visualization of terrain data and orthophoto using GRASS NVIZ via QGIS
How can I make 3D visualization of terrain data and orthophoto using GRASS NVIZ via QGIS? I am quite new with GRASS. I have only managed to get a 3D view of the terrain so far.
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Is there a simple way to clip multiple layers and orthophotos?
(*disclaimer, I don't know any Python/scripting) Ok, so I have clipped several layers in the past using Arcmap 10.+, but I am having a hard time wrapping my head around how hard it can be at times.
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Extracting DEM from imagery using ArcGIS for Desktop?
I'm using ArcGIS for Desktop and I'd like to know how can I extract the elevation model from a imagery of photos.
I have the have each image (jpg) geo referenced. After, I don't know what tool may use ...
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Unable to get processing extent to match desired raster output
I have a few thousand ortho mosaic tiles that I've resampled to a lower GSD and am trying to cut into larger tiles. I developed a script that has worked perfectly for thousands and thousands of tiles ...
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What is the best way to ortho-rectificate image from the plane?
I am very new in GIS and I am trying to ortho-rectificate my images. But after putting it on the map I see that results are not precise. We have images taken from the airplane, it's longitude, ...
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Raster clipping over 1300 km2 orthophotos
I have all of Denmark in 25 cm orthophotos added to my ArcMap (mosaic dataset). I've added a polygon of an area covering over 1300 km2. I've used the raster clip tool to clip the data into a new ...
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Fill no data area over ocean in orthophoto mosaic
We have recently received orthoimagery tiles for my county. The county is a series of islands and the imagery only covers the islands. Thus we have data gaps where there is only water. In past ...
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Do OrthoRectified Images have shadow?
Orthorectified images have removed relief displacements and tilt displacements. Since the assumption of orthorectification is to keep the light source at infinite distance so that the light rays are ...
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Adding orthophoto layer in QGIS
I have tracks (just waypoints) from my GPS in gpx format. I also have orthophoto pictures in tif format, that I would like to make a layer with
I use QGIS (1.8.0)
actually i know how to put it in, but ...
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What is the correct way to merge adjoining raster images?
I am trying to create a raster base layer from NAIP ortho imagery. Unfortunately for me, the area of interest is very near the intersection of four image files. I have tried a few approaches to ...
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Why is Orthorectify button not active in Image Analysis Windows of ArcMap
I wanted to Ortho rectify GeoEye HR imagery using existing RPC and IFSAR DTM in Image Analysis. According to ArcGIS Resource center http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/...
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