Tagged Questions

The observed biophysical cover of the earth's surface. Data are essential elements in a wide array of government and private sector activities, including inventory, management, monitoring, and modeling.

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3
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0answers
43 views

Geo and Population Coverage Calculation

We have Mapinfo and vertical mapper(discover). We are testing a dataset actually a mif file that has coverage area in vector format. Here the green one is the coverage and the other layer showing ...
0
votes
0answers
22 views

how separate Mixed classes

I am trying to deal with the aggregate data in Africover, I want to separate for example the mixed class – In North Kurdufan if I want the 6R from 2H/6R what is the a correct equation I have to write ...
2
votes
1answer
85 views

How to work out sqft/m of land coverage?

I am currently self teaching myself on qgis whilst volenteering on a project on a river catchment and your help is hugely appreciated! I need to be able to work out the percentage of land cover or ...
5
votes
2answers
92 views

Is there a way to increase the search radius of nearest neighbors for the Nibble tool?

I am working with a raster map vegetation types. I have about 20 types with unique raster code values that can be sorted into three classes: 1 - vegetation types I want to expand using the nibble ...
0
votes
0answers
55 views

Land Cover vector data for Saskatchewan / Manitoba Canada

Looking for Land Cover (aka Land Use) vector data for Saskatchewan / Manitoba Canada. Using Saskatchewan's site I can see the data but not download it as seen here: Another source is Data Basin but ...
1
vote
0answers
33 views

How do I use the SPOT land cover data?

This is a follow-up to my previous question: Where can I find recent rainforest (change) land cover data? I have succeeded in finding data that more or less meet my needs but I cannot interpret ...
2
votes
1answer
47 views

Where can I find recent rainforest (change) land cover data?

I want to try to get a handle on what's becoming of the world's rainforests right now but not seeming to find recent (i.e. around 2010) data. The stuff here: http://www.glcf.umd.edu/data/ as far as ...
3
votes
2answers
50 views

Works (publicly available) combining LUCAS with other European land data bases?

EUROSTAT provides the LUCAS dataset, a multi-purpose survey on the state and the dynamics of changes in land use and cover in the European Union. I wonder if there are any land classification ...
2
votes
1answer
93 views

What are the geometric principles and GIS techniques that I can use to generate a postcode coverage of my city at street scales?

Postal codes of Brazil and another countries are oriented to distribution logistics, and improvement of reliability in writing the postal addresses; but without much concern for the spatial ...
3
votes
3answers
143 views

Where to get Land Use data for the UK?

We're currently looking for a Land Use dataset for part of England (UK) and were wondering what datasets are out there, either free or commercial. One's we've found so far: ...
7
votes
2answers
143 views

How to remove long linear strips from polygons?

I have a polygon layer representing impervious land cover. This was taken from a land cover raster dataset. The impervious data represents all impervious surface that is not buildings or roads. I ...
4
votes
2answers
1k views

How do you use GIS to detect percentage of Land Use Change

I am a student in GIS I have a dissertation about land use change. I have questions about using ArcMap 10 for this aim, how can using GIS to detect the percentage of land use change. For example we ...
1
vote
0answers
74 views

Raster display for topographic map

I'm trying to see how good a custom topographic map could be using only free data For the moment I'm just playing with the data so of course the colours are not pretty. I did some classification and ...
4
votes
4answers
415 views

How to generalize and vectorize a LandUseClassification raster file?

I want to vectorize that rasterfile with its 6 landuse classes. The classification is very noisy and have to be generalized before. The result should be a polygone vector file. I use SAGA, (GRASS) ...
3
votes
1answer
84 views

CORINE LandCover: what about the accuracy?

How accurate is CLC? Do anyone know any scientific papers about that question? I tested the new CLC2006 for a region in turkey and its totally rubbish!
3
votes
0answers
56 views

Percent cover based equation for horizontal ground visibility?

I'm trying to put together a layer representing horizontal visibility at ground level. I'm thinking of using the EVC (vegetation cover) layer from the landfire project (see ...
3
votes
3answers
323 views

Remote sensing: How to define landuse from remote sensing data?

I am trying to research ways into obtaining landuse data for a project which calculates the visual impacts of wind parks. I have a DEM and DOPs for a relatively large region (5000km²), but I have no ...
2
votes
5answers
264 views

Land Use/ Land Cover for Hawaii

Talking to a friend of mine in Hawaii and I am from New Mexico. My question to you all is to see if there is a land use/land cover dataset for Hawaii. Thanks.
5
votes
1answer
85 views

What kind of high level semantic free GIS layers out there?

I'm looking for free GIS data that contains some high level information such as type of vegetation or type of soil or some other visual characteristics of the neighborhoods. I need more information ...
5
votes
3answers
1k views

Why doesn't the split tool return any records in the attribute table?

I've been trying to split a large land use shapefile using a set of study area polygons as the split feature, but when the function finally finishes running (the land use dataset is quite large), all ...
8
votes
3answers
1k 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 ...