Procurando o shapefile dos limites das cidades nos EUA?

Onde posso encontrar um arquivo de forma que contenha limites para as principais cidades dos Estados Unidos?

Eu tentei o site do censo, mas não consegui encontrar nada.

Os dados do TIGER da agência do censo estão disponíveis em http://www.census.gov/geo/www/tiger/

Um pouco velho, mas valioso.

http://www.census.gov/geo/cob/bdy/cc/cc00shp/cc99_d00_shp.zip

http://www.census.gov/geo/www/cob/cc2000.html

Você não diz se está usando esri ou não.
Os produtos ESRI vêm com um DVD de "dados e mapas".
Não está no shp, mas pode ser selecionado e convertido em forma usando o arcmap.
Eu instalei o meu em uma unidade de rede na pasta mapdata. O resto do caminho é assim.
G: \ MapData \ ESRI_Data \ streetmap_na \ data \ citylim.sdc

Verifique os arquivos TIGER / Line. Você deseja procurar as camadas "Local" para cada estado, que podem ser refinadas em arquivos de forma nacionais , selecionando cada estado. Ou, para a versão 2012, você pode pegar todos os estados desta página .

Obtendo os dados

Você pode adquirir os dados do local do censo dos EUA, que incluem cidades, aqui .

Por exemplo, os Dados do local de 2017 de Rhode Island estão disponíveis aqui .

Para facilitar o download em massa, a lista completa de dados de locais de 2017 é:

https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_01_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_02_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_04_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_05_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_06_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_08_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_09_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_10_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_11_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_12_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_13_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_15_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_16_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_17_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_18_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_19_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_20_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_21_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_22_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_23_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_24_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_25_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_26_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_27_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_28_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_29_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_30_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_31_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_32_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_33_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_34_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_35_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_36_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_37_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_38_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_39_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_40_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_41_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_42_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_44_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_45_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_46_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_47_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_48_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_49_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_50_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_51_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_53_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_54_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_55_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_56_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_60_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_66_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_69_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_72_place.zip
https://www2.census.gov/geo/tiger/TIGER2017/PLACE/tl_2017_78_place.zip

Interpretando os dados

A documentação técnica para os Dados do Censo dos EUA de 2017 está disponível aqui . Eu o encontrei pesquisando "namelsad classfp" no Google (nomes de campos incomuns dos shapefiles adquiridos anteriormente).

Procure no arquivo "_place" (com o sublinhado) para encontrar os significados dos campos nos shapefiles adquiridos anteriormente. Esses são:

Field    Length   Type     Description
STATEFP       2   String   Current state FIPS code
PLACEFP       5   String   Current place FIPS code
PLACENS       8   String   Current place GNIS code
GEOID         7   String   Place identifier; a concatenation of the current state FIPS code and place FIPS code
NAME        100   String   Current place name
NAMELSAD    100   String   Current name and the translated legal/statistical area description for place
LSAD          2   String   Current legal/statistical area description code for place
CLASSFP       2   String   Current FIPS class code
PCICBSA       1   String   Current metropolitan or micropolitan statistical area principal city indicator
PCINECTA      1   String   Current New England city and town area principal city indicator
MTFCC         5   String   G4110 (incorporated place) and G4210 (census designated place)
FUNCSTAT      1   String   Current functional status
ALAND        14   Number   Current land area
AWATER       14   Number   Current water area
INTPTLAT     11   String   Current latitude of the internal point
INTPTLON     12   String   Current longitude of the internal poin

Você desejará conhecer os valores da CLASSFPcoluna. Estes estão disponíveis aqui . Alguns dos relevantes são:

C1 An incorporated place that is governmentally active, is not related to an
Alaska Native village statistical area (ANVSA), and does not serve as a
minor civil division (MCD) equivalent.

C2 Incorporated place that also serves as a minor civil division (MCD)
equivalent because, although the place is coextensive with an MCD, the U.S.
Census Bureau, in agreement with state officials, does not recognize that
MCD for presenting census data because the MCD cannot provide governmental
services (applies to Iowa and Ohio only).

C3 Incorporated place that is a consolidated city.

C5 Incorporated place that also serves as a minor civil division (MCD)
equivalent because it is not part of any MCD or a county subdivision
classified as Z5.

C6 Incorporated place that coincides with or approximates an Alaska Native
village statistical area (ANVSA).

C7 An incorporated place that is an independent city; that is, it also
serves as a county equivalent because it is not part of any county and a
minor civil division (MCD) equivalent because it is not part of any MCD.

C8 The portion ("balance") of a consolidated city that excludes the
separately incorporated place(s) within that jurisdiction.

C9 An incorporated place whose government is operationally inactive and is
not included in any other C subclass.

U1 Census designated place (CDP) with a name that is commonly recognized for
the populated area, and designated as a populated place by the U.S.
Geological Survey.

U2 Census designated place (CDP) with a name that is not commonly recognized
for the populated area (e.g., a combination of the names of two or three
commonly recognized communities, or a name that identifies the location of
the CDP in relation to an adjacent incorporated place).

U9 A census designated place (CDP) that coincides with, or approximates, an
Alaska Native Village Statistical Area (ANVSA).

http://www.nws.noaa.gov/geodata/catalog/national/html/cities.htm

O arquivo é grande, mas acho que pode ser aparado conforme sua necessidade.

Suponho que você possa inferir as principais cidades por tamanho e / ou população. Nesse caso, você pode usar este banco de dados geográfico pré-associado que possui os limites das cidades de 2010, juntamente com as estimativas de área e população básica.

O koordinates.com é um local gratuito para encontrar vários formatos de arquivo de contorno da cidade. Você pode até escolher o sistema de coordenadas. Aqui está um link para as cidades do Texas.

Pesquise em outras cidades. Eles têm muito neste site. Você precisa criar um login.