Tag Info

New answers tagged

1

Try Compress Images. It keeps the best achievable quality/size ratio and automatically tunes the compression settings based on the content of every file, smartly balancing quality and size


0

You would have the call the export map method in the JavaScript API, or you can use Python or another language to make an HTTP request. See the REST API help docs for parameter information. This would be for online access. You have an "offline" tag, but don't mention that in your question. In case you need to do this, I am not sure how to make this work ...


0

Earth Explorer is an invaluable source for NAIP imagery. Access these images using the following steps: Define your area of interest in the "Search Criteria" tab. Here you can specify a county in CA by navigating to the Predefined Area tab > Add Shape > California > County > YourCounty Select data: Data Sets tab > Aerial Imagery > NAIP ...


1

The Cal-Atlas site has 2012 NAIP R,G,B,NIR quarter-quad tiffs available for download. The USDA-APFO provides a REST ArcGIS webmap service which now contains the NIR band. To use this service you will need to add a GIS Server in ArcGIS. 1) Open ArcCatalog and in the Catalog Tree select "GIS Servers" 2) Double click "Add ArcGIS Server" 3) In wizard select ...


1

As I read it, that service only supports export for tiled offline use. Quoting the map service metadata: This map service is designed to support exporting small volumes of basemap tiles for offline use, according to the access and use constraints below. This map service is not intended to be used to access live map tiles for use in a web map or ...


0

I' think it is not a matter of R ..only. Here a small sketch howto realize the referencing stuff under Linux. You can use GDAL to create a georeferenced axis parallel image from your heli position data, assuming, that your image has the dimension width and height and the bounding box is given by may be GPS-coodinates stored in UTM-33 shown in this table: ...


1

Which part of the world are you looking at? Archival SPOT imagery is available in many areas,but may be restricted to education and research uses. Check NASA and USGS for data. Depending on the location and scale there may be something already done that you can use for your purposes so don't reinvent the wheel if you don't have to.


1

I just found a proceeding paper by Maurice Schönert et al. (2014) in which they derive Tasseled Cap Coefficients for the RapidEye sensors. I haven't tested it myself, but it looks promising.


2

If you want to clip for cartographic reasons and do not want to generate a clipped raster, you can do this via Data Frame Properties if your grid layer is a polygon, Data Frame Properties>Data Frame>Clip Options>Specify Shape (use your grid layer here).


2

You want to clip your raster (image) by your feature layer (your six squares). Simon Woo's article offers some solutions. If you have Spatial Analyst, Extract by Mask will do the trick.



Top 50 recent answers are included