Questions tagged [tabulate]

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5
votes
1answer
522 views

Tabulate Area using GDAL and Numpy

How could I perform a Tabulate Area using GDAL and Numpy? I am trying to summarize how many pixels of each class in a Landcover raster are within each polygon of a Census Blocks shapefile. I've ...
5
votes
1answer
940 views

Tabulate Area ArcGIS

I am trying to work out the relationship between the 'processing cell size' and the result from Tabulate Areas. If one uses the same as the raster cell size, and this is the same for both rasters, the ...
3
votes
2answers
2k views

Tabulate Area in ArcGIS for Desktop not creating correct output?

I have used the Tabulate Area zonal spatial analyst tool in ArcGIS many times, and am encountering a problem for the first time. I am using a polygon grid (fishnet) as my zone dataset, and tabulating ...
2
votes
5answers
31k views

How to calculate a percentage of an area covered by polygons ArcGIS 10.1

I created an Aspect Layer with 9 Zones on which I want to use the Tabulate Area Tool with another polygon layer namely Woods. So what I actually need to know is the percentage, covered by woods for ...
2
votes
1answer
925 views

Tabulate Area for large datasets

I have been struggling trying to use Tabulate Area in Arc 9.3 for a large raster dataset. I have one raster with 8 land uses and another vector layer with zones (which I converted to a raster with ...
2
votes
2answers
784 views

Calculating area of different land uses within boundaries

I am looking to calculate the percentage cover of different land classes in a number of districts in southern Malawi. The land cover map (raster) can be found here - http://www.masdap.mw/layers/...
2
votes
1answer
293 views

Tabulate Area produces weird results

I have a raster of land cover (resolution roughly 300x300 m) and a raster grid of zones (cells about 14000x14000 m). What I need is to calculate the precentage of each land cover category within each ...
2
votes
1answer
2k views

Finding the area of polygons within other polygons in R [duplicate]

Is there a function in R which will loop through a layer of zonal polygons (i.e. a polygon grid) and return the area of a second polygon layer that is contained in each grid cell? I have a layer of ...
1
vote
1answer
502 views

Tabulate area in QGIS

Does anyone know if there exists in QGIS any tool similar to "Tabulate Area" of ArcGIS to be able to calculate what percentage of values of a raster for each polygon? So far I am using pktools, ...
1
vote
1answer
67 views

Calculate area of adjoining raster class cells inside polygon

I am calculating the size of deforestation in private properties. My two data sets are a raster layer of deforested patches, each containing a number as the year it has been deforested, and a polygon ...
1
vote
1answer
57 views

Unique pairs based on multi values

I will try to be as detailed as I can with the purpose and walkthrough of the situation. I have 2 Feature Classes (fc1 and fc2). fc1 is a polygon shapefile with no overlapping polygons and an id for ...
1
vote
1answer
768 views

Tabulate intersect in R

I would like to get the areas related to the polygons resulting from the intersection between two SpatialPolygonsDataFrames: 'A' and 'B'. SpatialPolygonsDataFrame 'B' has 3 different 'classes', which ...
1
vote
1answer
169 views

How to extract information from several shapefiles in the same time?

I'm using ArcGIS 10.2.1. I have a shapefile for 10 catchments and other three shapefiles for landuse, soil type and rock types. To extract the area of land use types, soil types or rock types for each ...
1
vote
1answer
32 views

How to import coincide table of r.coin tool of QGIS in Excel

I am trying to do a crosstabulation analysis with QGIS. I have used the grass tool r.coin and I have got the coincide report in txt format. However, I want to work with that report in excel, but I don´...
1
vote
0answers
241 views

Tabulate Intersection

I'm attempting to calculate land use mix and in order to do so I need the proportion of each land use within each polygon zone. When i use the tabulate intersection tool I get proportions that are ...
1
vote
0answers
51 views

Inconsistency in areas extracted using Tabulate Area tool

I am extracting data using the tabulate area tool. The data has too many duplicates for each plot. However, when extracting these plots with duplicates separately, I do not see the duplicate values. ...
1
vote
0answers
239 views

Tabulate Areas is losing rows [closed]

I've got a feature layer of certain fields (which I converted to raster), and a raster layer of different vegetation types. I now want to compute the area of each vegetation type for each field. For ...
0
votes
1answer
79 views

Telling Tabulate Area to use custom textual labels for column names?

I have a land use raster with unique values of 1-8 and the appropriate label names for the land use are defined under the symbology tab. When I process that raster with the Tabulate Area tool in ...
0
votes
2answers
855 views

Overlapping polygons causing issues with Tabulate Area (Spatial Analyst) Tool

I am attempting to create a table that summarizes habitat information for a given survey area. My habitat information is in the form of a local raster file, with codes for specific habitat classes. My ...
0
votes
1answer
1k views

Tabulate area tool's output results units?

I'm using ArcGIS DEsktop and I have tried to calculate the area of each different land cover class in a raster of 25m size in British National Grid coordinate system. To do that I used the tabulate ...
0
votes
1answer
1k views

Using ArcGIS Tabulate Intersection to determine maximum land cover within polygon area

I have a shapefile (layer A) containing different polygons - each polygon representing an ecoregion. I have another layer of polygons (layer B) - each polygon representing a watershed boundary. I want ...
0
votes
0answers
12 views

When tabulating area zone field doesn't populate in .dbf table

I am using the tabulate area tool to calculate area of habitat types around banding sites. Each site has a unique name, so I used that when selecting my zone_field in the tool. However, when I run ...
0
votes
0answers
32 views

Convert tabulate area's output format into a text file (.txt or .csv) in the ModelBuilder in ArcGIS?

When I use the Tabulate Area tool, the original output's format is .dbf. What can I do to export the output as a text file (.txt or .csv) in the ArcGIS ModelBuilder environment?
0
votes
1answer
112 views

How to ensure raster tabulation is in integer using 'tabulate area' tool?

I'm trying to tabulate raster cells based on its values using the 'Tabulate Area' tool, but the result shows decimal values instead of integer. Is there any way I can ensure the result of the ...
-1
votes
0answers
22 views

Calculating forest loss within individual zones

I am using the Hansen forest cover and loss dataset in ArcMap in order to calculate both forest cover and forest loss within specified zones. I basically am using Modelbuilder to iterate through all ...