Base mapping of Swedish inland sandlands

Knowledge of inland sandlands — Natura 2000 types of rice sand heaths (2320) and grass sand heaths (2330) — distribution and prevalence in the country is poor. In order to gain a better understanding of the occurrence of these habitats in the country, a mapping has been carried out with aerial interpretation of infrared aerial images against a background of different mapping layers. The mapping was limited to areas located within a zone of 5 km from the coast within the continental and boreal biogeographical region. A special mapping was made of beaches along the six large lakes. All already known inland sandlands (NNK and TUVA) have also been aerial image interpreters.In connection with the aerial image interpretation, calibrations were made in fields in Jönköping County, Västra Götaland County and Dalarna County, both already known inland sands and new identified in the aerial image interpretation. A total of 798 grass sand heaths and 150 rice sand heaths have been mapped. Previously there were 141 objects with grass sandhed and 46 objects with rissandhed mapped in NNK and TUVA. The areas are spread throughout the country. The assignment was carried out by ProNatura and described in more detail in the report “base mapping of inland lands in Sweden, Accounting of assignments”, NV Dnr NV-03273-13.该国对内陆砂质生境——即自然2000（Natura 2000）框架下的水稻砂质荒沼（rice sand heaths，代码2320）与草本砂质荒沼（grass sand heaths，代码2330）——的分布与覆盖现状认知匮乏。为深入明晰该国此类生境的分布特征，研究团队以多套地理制图图层为背景，通过红外航空影像目视解译开展了生境制图工作。本次制图范围限定于大陆性与北方生物地理区内、距海岸5公里范围内的区域，并针对六大湖泊沿岸滩涂开展了专项制图。所有已探明的内陆砂质生境（NNK与TUVA）也均通过航空影像完成了解译。配合本次航空影像解译工作，研究团队在延雪平郡、西约塔兰郡及达拉纳郡的野外开展了实地校准，校准对象既包含已探明的内陆砂质生境，也包括通过航空影像解译新发现的目标。 本次共完成798处草本砂质荒沼与150处水稻砂质荒沼的制图工作。此前在NNK与TUVA范围内仅制图记录了141处草本砂质荒沼与46处水稻砂质荒沼。上述生境分布覆盖全国范围。 本次项目由ProNatura机构承接，详细内容已刊载于报告《瑞典内陆生境基础制图：项目核算报告》（NV Dnr NV-03273-13）中。