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GeoPAT 2 - a suite of modules dedicated to analysis of large datasets in their entirety using spatial and/or temporal patterns

Home Page: http://sil.uc.edu/index.php?id=geopat2

License: GNU Lesser General Public License v3.0

Makefile 1.61% C 98.39%

geopat

geopat2's Introduction

Hi, I'm Jakub Nowosad 👋

I'm a computational geographer based in Poznan, Poland. My work focuses on analyzing and understanding spatial patterns, and I enjoy sharing my insights with others.

What I'm up to 💻

Researching and writing about spatial patterns in my papers and books (check them out here)
Creating R packages that make geocomputation easier and more accessible to others (see my projects here)
Sharing my thoughts and expertise on my personal blog and the geocompx blog (read them here and here)
Providing workshops and consulting services to help others learn about geocomputation and spatial analysis (details here)

Let's connect! 🤝

I'm always interested in connecting with others who share my passion for geocomputation and spatial analysis. Feel free to reach out to me on Mastodon. You can also learn more about me and my work at jakubnowosad.com.

geopat2's People

Contributors

Stargazers

Watchers

Forkers

nemochina2008 robinlovelace canglangshushu omarun dondealban geoendemics

geopat2's Issues

header file for gpat_compare

One installer?

Post biogis ideas

Allowing for processing of the data without spatial reference (xy coordinates)
Increasing of the analysed area (aka boundary issue)

[JS]

gpat_segquality issue

e.g. rook topology

The number of segments and the dimensions of the distance matrix are different

I have a case where the number of rows of the distance matrix and the number of segments is different:

$ wc -l forms_ni_seg20_matrix_seg.csv
4139 forms_ni_seg20_matrix_seg.csv

vs.

$ ogrinfo -so -al forms_ni_seg20.shp
INFO: Open of `forms_ni_seg20.shp'
      using driver `ESRI Shapefile' successful.

Layer name: forms_ni_seg20
Metadata:
  DBF_DATE_LAST_UPDATE=2018-02-28
Geometry: Polygon
Feature Count: 4821
Extent: (1567218.101930, 5390724.144650) - (2089218.101930, 6194224.144650)
Layer SRS WKT:
PROJCS["Transverse_Mercator",
    GEOGCS["GCS_grs80",
        DATUM["New_Zealand_Geodetic_Datum_2000",
            SPHEROID["GRS_1980",6378137,298.257222101]],
        PRIMEM["Greenwich",0],
        UNIT["Degree",0.017453292519943295]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",173],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",1600000],
    PARAMETER["false_northing",10000000],
    UNIT["Meter",1]]
segment_id: Integer64 (11.0)

Of course, once in R, this causes all sort of issues:

> segm$class <- hclust_cut
Error in `[[<-.data.frame`(`*tmp*`, i, value = c(1L, 1L, 2L, 3L, 3L, 3L,  : 
  replacement has 4138 rows, data has 4821

After a bit of work and adding the segments ID from the cut using a proper full join, I do get a map where the segments corresponding to the bottom of the map are missing.

Add travis

Remove debug (-g) flag after tests

add acknowledgement

gallery of examples

Can't get `gpat_gridhis` to work with more than one layer of categorical data

Using the latest version of geopat2, I can't seem to get the multi-layers mode to work with gpat_gridhis. I've tried to use the command that is briefly mentioned in the manual, and get the following errors:

$ gpat_gridhis -i landcover.tif -i forms.tif -o /tmp/test_gpat_gridhis -s prod -z 25 -f 25 -t 2
gpat_gridhis: excess option -i|--input=forms.tif

$ gpat_gridhis --input=landcover.tif -input=forms.tif -o /tmp/test_gpat_gridhis -s prod  -z 25 -f 25 -t 2
gpat_gridhis: excess option -i|--input=nput=forms.tif

Can't run multilayer segmentation on cathegorical maps

I'm using a DEM and a landform tif file, and I keep getting this error when I try to use gpat_segment:
Header file does not exist
SML error: No such file or directory.

Full decomposition gpat_pointshis

system("gpat_pointshis -i data/geomorph.tif -o data/query_signature.txt -s fdec -z 64 -x 751960.498319564 -y 2096539.09643261")

For full decomposition, size has to be a power of two.

Add codecoverage

How to avoid "not enough RAM" error on gpat_polygon

I'm getting the following error using gpat_polygon on quite a large dataset:

Calculating statistics... OK
Signature length: 55
Calculating extents of polygons...     Not enough RAM to proceed!

Apart from getting more RAM (already running 32 Go RAM on my machine), is there any way to get around this (tiling ?)

I am getting No RAM to proceed, is this about computer memory ? if yes, am I using bad parameters as this tif file is very small (~3MB).